Classifications

• • B—PERFORMING OPERATIONS; TRANSPORTING
  • B42—BOOKBINDING; ALBUMS; FILES; SPECIAL PRINTED MATTER
  • B42D—BOOKS; BOOK COVERS; LOOSE LEAVES; PRINTED MATTER CHARACTERISED BY IDENTIFICATION OR SECURITY FEATURES; PRINTED MATTER OF SPECIAL FORMAT OR STYLE NOT OTHERWISE PROVIDED FOR; DEVICES FOR USE THEREWITH AND NOT OTHERWISE PROVIDED FOR; MOVABLE-STRIP WRITING OR READING APPARATUS
  • B42D25/00—Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof
  • B42D25/30—Identification or security features, e.g. for preventing forgery
  • B42D25/36—Identification or security features, e.g. for preventing forgery comprising special materials
  • B42D25/378—Special inks
  • B42D25/382—Special inks absorbing or reflecting infrared light

Definitions

• Optical security feature suitable for track & trace and / or
• the present invention is based on a method for marking products with the aid of an ink formulation which contains semiconducting inorganic nanocrystals which, when excited by photons, emit radiation in the range of 750-1800 nm, in serialization and / or track & trace systems.
• the unique codes can be passed on to third parties by staff. They can then print the codes on the counterfeit products so that, according to the database, they can be regarded as "genuine".
• This invention thus represents a combination of track & trace technology and optical security features. The tracing process and the authentication process of products are thus combined with one another.
• Track & Trace programs (US 9,027,147; US 8,898,007; US 2009/0096871; US 8,700,501) are used to ensure the clear tracking and tracing of all process steps in the production and supply chain. In addition, they enable comprehensive control options for the manufacturer and transparency for the consumer, since the locations and routes of products can be seamlessly documented.
• NIR near infrared
• EP 0 933 407; US 5,282,894; US 5,665,151; WO 1998/018871; WO 2003/038003; US 10,119,071; US 5,542,971 organic dyes from the near infrared (NIR) range
• these organic NIR dyes have some disadvantages, such as one low quantum yield below 20%, low thermal stability and high susceptibility to external influences such as oxidation or photobleaching, whereby these dyes often lose more than 50% of the original fluorescence intensity (quantum yield) even with low exposure to radiation.
• the present invention is based on the concept that the optical security feature is invisible to the human eye and only with the help of optical detection systems (e.g. spectrometers or NIR camera systems) and possibly mobile devices (e.g. smartphone, tablet, etc.) or other appropriate reading devices is to be detected.
• NIR rays are emitted by inorganic materials.
• This optical security feature cannot be recognized by the human eye for the counterfeiter. Only after excitation with higher energy than the emission signal (e.g. blue and / or white light), which is generated, for example, by end devices such as smartphone flashes or tablet flashes or appropriately equipped read-out devices, as well as higher energetic NIR radiation, does the optical security feature emit NIR radiation. This is detected by the reading device.
• the emission signal e.g. blue and / or white light
• the inorganic materials used are characterized by a high level of stability against environmental influences and a special excitation and emission pattern that allow optical excitation and detection with the aid of commercially available end devices such as smartphones or tablets. In addition, these materials have a high quantum yield of over 20%, which is necessary for detection using such devices.
• the products labeled in this way are more forgery-proof because the counterfeiters would have to synthesize the respective inorganic materials, disperse them in the respective ink formulations and print the respective codes.
• the inorganic material used can be identified directly with the help of software (e.g. spectrometer for smartphone).
• the present invention relates to a method of marking products, comprising the following steps: Providing an ink formulation which is semiconducting inorganic
• the invention also relates to an optical security feature on at least one surface of the surface of a product in the form of a unique code which contains semiconducting inorganic nanocrystals which, when excited by photons, emit radiation in the range of 750-1800 nm.
• the invention further relates to an optical security feature on at least one surface of the surface of a product which contains semiconducting inorganic nanocrystals which, when excited by photons, emit radiation in the range of 750-1800 nm. Furthermore, the invention relates to a serialization and / or track & trace system which contains an optical security feature including a unique code as described herein which is printed on a product. In addition, the invention relates to the use of a unique code printed on a product, as described herein, as an optical security feature in a serialization and / or track & trace system.
• product in the sense of the present invention includes the products themselves, insofar as they can be labeled, their packaging, product labels (tags), barcode cards and barcode labels, as well as all other possibilities with which a product is usually used during the production process and / or of the transport including the documentation would be marked.
• ink formulation in the context of the present invention encompasses any desired solvent and combinations of the same and typical additives which are suitable for producing a printable liquid.
• printing in the context of the present invention encompasses the deposition of pigments on or in a solid substrate. Typical examples are, but not exclusively, digital printing, inkjet printing, screen printing, transfer printing, stamp printing, roll-to-roll, non-contact printing, laser printing as well further procedures, figures
• FIG. 1 shows an overview of a possible embodiment of the method according to the invention for labeling products.
• FIGS. 2 ad show examples of the method according to the invention for identifying products using a one-dimensional code.
• Figures 2 ac show Printed one-dimensional codes with ink formulations according to the invention with different print resolutions on white cardboard (FIG. 2 a: 350 dpi, FIG. 2 b: 400 dpi, FIG. 2 c: 450 dpi).
• FIG. 2 d shows the emission pattern of the one-dimensional code from FIG. 2 c
• FIGS. 3 a-c show examples of the method according to the invention for identifying products using a two-dimensional code.
• FIGS. 3 a-c show printed two-dimensional codes with ink formulations according to the invention with different print resolutions on white cardboard (FIG. 3 a: 400 dpi, FIG. 3 b: 450 dpi, FIG. 3 c: 500 dpi).
• FIGS. 4 a-b show examples of individual printing inaccuracies or printing defects of a single printer, which can be used as an individual and unique pattern for generating a unique code.
• the present invention relates to a method of labeling products, which includes the following steps:
• an ink formulation which contains semiconducting inorganic nanocrystals which, when excited by photons, emit radiation in the range of 750-1800 nm.
• the ink formulation is preferably a commercially available ink formulation suitable for the deposition of pigments on or in a solid substrate.
• Typical examples are, but are not limited to, digital printing, inkjet printing, screen printing, transfer printing, stamp printing, roll-to-roll, non-contact printing, laser printing, and other processes.
• This ink formulation can already contain color pigments. This results in the unique code printed with the ink formulation being visible to the human eye.
• the detection of the radiation emitted by the irradiated product in the range of 750-1800 nm is therefore a further optical security feature in addition to the unique visible code.
• the ink formulation contains no further color pigments apart from the semiconducting inorganic nanocrystals.
• the unique code printed with the ink formulation is not visible to the human eye because of the concentration of the ink formulation. The unique code is therefore not immediately visible but can only be discovered and read out after the product printed with the ink formulation has been irradiated with photons by detecting the radiation emitted by the irradiated product in the range of 750-1800 nm.
• a unique code is first printed on at least one surface of the product using a commercially available ink formulation.
• the ink formulation which contains the semiconducting inorganic nanocrystals, is then printed selectively in the form of drops and / or in the form of a further unique code on the existing unique code.
• the ink formulation according to the invention preferably does not contain any pigments, so that the Drops and / or the other unique code are not visible to the human eye.
• the unique code according to one of the preceding embodiments is printed on at least one label, which is then stuck to at least one surface of the product.
• the unique code according to one of the first three embodiments is printed on product labels (tags), barcode cards and / or barcode labels.
• the ink formulation contains two or more, for example 2, 3, 4, 5, 6 or 7, differently emitting semiconducting inorganic nanocrystals as well as further color pigments.
• the unique code printed with the ink formulation is visible to the human eye. The detection of the radiation emitted by the irradiated product in the range of 750-1800 nm is therefore a further optical security feature in addition to the unique visible code. Both the different emission maxima and the respective (intensity) ratios can also be stored in at least one database.
• the ink formulation contains two or more, for example 2, 3, 4, 5, 6 or 7, differently emitting semiconducting inorganic nanocrystals without further color pigments. In this
• the unique code printed with the ink formulation is not visible to the human eye because of the concentration.
• the detection of the radiation emitted by the irradiated product in the range of 750-1800 nm is therefore a further optical security feature in addition to the unique visible code.
• Both the different emission maxima and the respective (intensity) ratios can also be stored in at least one database.
• the semiconducting inorganic nanocrystals are preferably selected from the group of perovskites, I-VI semiconductors, II-VI semiconductors, III-V semiconductors, IV-VI semiconductors, I-III-VI semiconductors, carbon dots and mixtures thereof .
• suitable semiconducting inorganic nanocrystals include AgS, AgSe, AgTe, CdS, CdSe, CdTe, PbS, PbSe, PbTe, SnTe, ZnS, ZnSe, ZnTe,
• perovskite materials with the general formula ABX 3 or A4BX6, where X can be selected from CI, Br, I, O and / or mixtures thereof, where A is selected from Cs, CH 3 NH 3 , CH (NH 2 ) 2 , Ca, Sr, Bi, La, Ba, Mg and / or mixtures thereof, where B can be selected from Pb, Sn, Sr, Ge, Mg, Ca, Bi, Ti, Mn, Fe and / or mixtures thereof.
• core / shell and / or core / multi-shells are made of semiconducting inorganic nanocrystals architectures made of II-VI, III-V, IV-VI, I-VI, I-III-VI semiconductors or mixtures thereof as well as core / shell and / or Kem / Multi shells made of perovskite materials, other suitable examples.
• the crystal lattice of the semiconducting inorganic nanocrystals can additionally, but not exclusively, with one or more metal ions, such as Cu + , Mg 2+ , Co 2+ , Ni 2+ , Fe 2+ , Mn 2+ and / or with one or more metal ions, such as Cu + , Mg 2+ , Co 2+ , Ni 2+ , Fe 2+ , Mn 2+ and / or with one or more
• Rare earth metals such as ytterbium, preseodymium or neodymium, be doped.
• the semiconducting inorganic nanocrystals preferably have an average particle size of from 1 nm to 100 nm, more preferably from 2 nm to 50 nm and most preferably from 3 nm to 15 nm in at least one dimension, preferably in all dimensions.
• the average particle size can be increased / modified by various methods. Typical examples are, but not exclusively, a silica shell, a titanium oxide shell, a halogen shell and other methods for increasing stability, masking, biocompatibility, water solubility and / or coating.
• the semiconducting inorganic nanocrystals are preferably photoluminescent substances that are brought into electronically excited energy states by light absorption, and then again reach energetically lower energy states by emitting light in the form of fluorescence.
• the semiconducting inorganic nanocrystals are preferred from visible
• the semiconducting inorganic nanocrystals emit radiation with a wavelength in the range from 750 to 1800 nm, more preferably from 800 to 1400 nm, most preferably from 850 nm to 1100 nm under photon excitation. These wavelength ranges are in the invisible near-infrared range.
• One of the properties of the semiconducting inorganic nanocrystals which is of interest for the present invention is that their excitation and emission spectrum depends, among other things, on their particle size.
• the proportion of the semiconducting inorganic nanocrystals in the ink formulation is preferably 0.01 to 70.0% by weight, more preferably 0.05 to 40.0% by weight, most preferably 0.1 to 30.0% by weight, measured at the Total weight of the ink formulation.
• a range between 0.01 - 10.0% by weight is preferred.
• the ink formulation can contain semiconducting inorganic nanocrystals which have at least one or all, preferably all, of the following properties in common: emission wavelength, emission distribution, emission maximum.
• the ink formulation can contain mixtures of semiconducting inorganic nanocrystals which have different values for emission wavelength, emission distribution and emission maximum.
• the ink formulation can contain the color pigments of the commercial inks.
• Commercial ink formulations can be used and the semiconducting inorganic nanocrystals added to them.
• the radiation emitted by the ink formulation can produce an individual fluorescence spectrum, which is dependent on the type, amount and particle size of the semiconducting inorganic nanocrystals.
• the individual fluorescence spectrum can be detected with a spectrometer.
• the detected individual fluorescence spectrum can then be compared with a reference spectrum stored in a database.
• this individual fluorescence spectrum can be used as a further security feature for an ink formulation individually mixed by the manufacturer of the product.
• the ink formulation for, for example, inkjet printing preferably has a reciprocal no-care number of less than 14, more preferably from 1 to 10, even more preferably from 1 to 8 and most preferably from 2 to 4.
• a unique code for identifying a product is generated.
• At least one reference variable, preferably several reference variables, of the product is encrypted with the aid of a unique key.
• Possible reference values are, for example, reference values to the type and nature of the product such as serial numbers, lot numbers, CAS numbers for chemical products, to the place of production, to the time of production, to the place of delivery, to the producer, to the supplier, to the buyer or similar.
• the unique key can be an algorithm made available to the producer or an algorithm created by the producer himself.
• This unique code can be a one-dimensional code such as a
• a barcode a two-dimensional code, such as a QR code, or a three-dimensional code, such as a colored barcode.
• the unique code can also contain one or more patterns such as areas, stripes, lines, geometric figures such as circles, triangles, rectangles, polygons etc., alphanumeric characters, images or combinations thereof.
• the printout usually shows no production inaccuracies whatsoever. However, if you look at the micrometer scale, you can usually see an individual pattern. This can be caused, for example, by blockages of the pressure glands, partial blockage of the pressure glands, distraction the ink droplet or delayed deposition of the ink droplet from the printing gland. This creates an arbitrary pattern at the micrometer level, which is unique for each printing process (fingerprint). This is visualized as an example in FIGS. 4 a and b.
• This unique pattern can be extracted into a unique code using IT applications, which can also be stored in encrypted form in the database. This form of the unique code can also be used to specifically individualize individual objects, for example individual species from a multi-part product series.
• an already established unique code can be printed on at least one surface of a product with the aid of the ink according to the invention.
• the individual pattern achieved by printing inaccuracies and printing defects during this process step of pressing the ink formulation onto at least one area of the surface of the product can then be used as an additional optical security feature and optionally stored in a database.
• the process step according to the invention takes place in this embodiment
• the unique code can only be derived from the pattern printed with the ink formulation according to the invention.
• a pattern as described herein is printed on at least one surface of the product. This pattern is then analyzed for printing inaccuracies and printing defects and an individual pattern is derived from this. This individual pattern can then be linked to the reference values of the product as described herein and used as a unique code and, if necessary, stored in a database.
• the method step according to the invention takes place - generation of a unique code for identifying a product; after the process step
• This unique code from the individual pattern of printing inaccuracies and printing defects can also be encrypted, combined and / or encrypted and / or stored with another unique code that was created using conventional methods and contains further reference values for the product.
• These two unique codes can be treated as individual unique codes so that two unique codes are printed on the product, which encode the different reference values of the product and are stored and detected as independent individual codes. Both individual codes can be printed using the ink formulation of the present invention. However, the second unique code, created using traditional methods, can also be printed using a traditional ink formulation.
• these two unique codes can also be combined into a single unique code in that a combined unique code is generated from the two individual unique codes as a one-dimensional code, two-dimensional code or three-dimensional code as described herein.
• This combined unique code can then in turn be printed onto the product using the ink formulation of the invention.
• This embodiment thus comprises two staggered printing processes with the aid of the ink formulation according to the invention, in the following chronological order: Printing the ink formulation on at least one area of the surface of the product in the form of a unique code consisting of an individual pattern caused by printing inaccuracies and printing defects during printing ;
• the ink formulation is printed on at least one area of the surface of the product in the form of this unique code.
• Each packaging unit of the product is preferably printed with its own unique code.
• Surface of the product in the form of this unique code includes both the printing of the ink formulation directly on at least one area of the surface of the product, insofar as the objectivity of the product permits, and the printing of the ink formulation on at least one label in the form of this unique code and Sticking / labeling the surface of the product with at least one printed label.
• the step "Printing the ink formulation on at least one area of the surface of the product in the form of this unique code" can also print the ink formulation directly on at least one area of the surface of the packaging of the product or sticking / labeling the surface of the product with at least one printed label.
• the usual printing methods can be used for this, depending on the type of ink formulation.
• the ink formulation is preferably printed on at least one area of the surface of the product by means of digital printing, screen printing, transfer printing, roll-to-roll printing processes, “printing without contact” processes or laser printing.
• the unique code can be printed directly on the surface of the product, on the packaging of the product, as well as on labels, signs, barcode cards and / or barcode labels.
• the ink formulation can also be used in other patterns such as areas, stripes, lines, geometric figures such as Circles, triangles, rectangles, polygons, etc., alphanumeric characters, or combinations thereof, can be printed on at least one area of the surface of the product.
• the printed pattern can serve as a pure authentication feature or contain information such as safety and usage instructions or manufacturer information.
• the product printed with the ink formulation is irradiated with photons.
• the semiconducting inorganic nanocrystals in the ink formulation are brought into excited energy states (excitation).
• the product printed with the ink formulation is preferably irradiated with visible light, preferably with blue or white light.
• a halogen lamp or LED lamp preferably a blue or white LED lamp, is used as the light source.
• a suitable light source for irradiation is also an LED flash, such as the LED flash of an end device such as a smartphone or tablet.
• the irradiated product preferably the semiconducting inorganic nanocrystals in the ink formulation, emits radiation in the range from 750 to 1800 nm, preferably from 800 to 1400 nm, most preferably from 850 nm to 1100 nm.
• the emitted radiation can be detected with any suitable detection device.
• the emitted radiation is preferably detected by a terminal such as a smartphone or tablet.
• the camera systems of these terminals usually have a silicon-based image sensor that can detect incident photons up to a wavelength of approx. 1100 nm.
• the semiconducting inorganic nanocrystals detect radiation emitted via these image sensors.
• the photoluminescent substance preferably the semiconducting inorganic nanocrystals in the ink formulation, must have a high quantum yield.
• the semiconducting inorganic nanocrystals in the ink formulation preferably have a quantum yield in the range between 20-100%, more preferably in the range between 40-100%, most preferably 60-100%.
• the quantum yield or quantum efficiency indicates the ratio between the number of emitted and absorbed photons.
• the unique code can also be read out with the aid of commercial barcode scanners if the unique code is visible to the human eye.
• the detection of the radiation emitted by the semiconducting inorganic nanocrystals serves as a further security feature.
• the method according to the invention thus has the advantage that it can also be used by end consumers without additional financial outlay. This provides a simple and inexpensive method for retailers and end consumers to verify the authenticity of a product. The method according to the invention can thus be used as an authentication solution on an optical basis.
• serialization structured data is mapped onto a sequential form of representation.
• Serialization is mainly used for the transfer of objects over the network in distributed software systems. The following additional steps are preferred for use in serialization systems:
• one or more reference values of a product can be recorded and / or encrypted with the help of a unique key.
• An appropriate serialization and / or track & trace computer program generates a unique code that is printed on the product.
• the code is stored in a database, preferably a central database. The code can then be scanned at any time and read from the database. The encrypted reference quantities of the product can thus be read out via the serialization and / or track & trace computer program.
• the ink formulation is additionally printed in the form of the unique code on at least one area of the surface of a packaging group containing the product, for example selected from bundles, outer packaging, pallets. This enables seamless tracking of the product during the production and transport route of the individual product.
• the present method thus represents a combination of Track & Trace technology and optical security features
• the tracking process and the authentication process of products are combined.
• FIG. 1 shows an overview of a possible embodiment of the method according to the invention.
• reference values of a product such as the place and time of production, ingredients of the product, dosage forms, etc.
• a track & trace computer program is then used to generate a code from these encrypted reference values.
• This code can be a one-dimensional, two-dimensional or three-dimensional code, e.g. a barcode, a QR code or a colored barcode.
• This code is stored in a central database via the Track & Trace computer program.
• the code is printed on the surface of the product using the ink formulation disclosed herein.
• this ink formulation preferably contains further color pigments, so that the printed code is visible to the human eye.
• the code can be printed directly on the surface of the product or on the packaging of the product.
• the code printed with the aid of the ink formulation disclosed herein can now be used in two ways, on the one hand as track and trace identification and on the other hand as optical authentication identification.
• the code can be read out with a scanner.
• the code is transmitted to the Track & Trace computer program.
• the code is read from the database and decrypted.
• the reference values of the labeled product are thus obtained.
• the code and all other possible identifications with the ink formulation disclosed herein can also be used as optical authentication identification.
• the surface of the product is irradiated with light, preferably white or blue light, preferably white or blue LED light.
• the photoluminescent substance preferably the semiconducting inorganic nanocrystals in the ink formulation, are excited here, as discussed above, and then emit fluorescent radiation in the range of 750-1800 nm (NIR radiation). This radiation cannot be perceived by the human eye. Instead, an electronic device that can detect the NIR fluorescence radiation is required for detection. For example, spectrometers, NIR cameras, but also end devices such as smartphones or tablets that have a silicon-based image sensor in their camera systems that can detect incident photons up to a wavelength of approx. 1100 nm would be suitable. These terminals can also be used to excite the photoluminescent substance via the camera flash.
• the control of the flash for excitation and the detection can take place via a corresponding app, so that after excitation and detection a corresponding photo of the code appears on the screen of the end device.
• This photo thus serves as an optical authentication feature and allows the product to be authenticated.
• the method according to the invention thus extends a serialization or track & trace system by an optical security feature that is not visible to the human eye.
• This optical security feature can be detected by simple means that are also available to the end consumer, so that simple and inexpensive authentication is possible.
• the semiconducting inorganic nanocrystals used have a high quantum yield and are insensitive to temperature fluctuations, oxidation and photobleaching.
• the safety can be further increased by using a specific mixture of semiconducting inorganic nanocrystals with special
• the method according to the invention also has a clear cost advantage for holograms.
• the present invention also relates to an optical security feature on at least one area of the surface of a product in the form of a unique code that contains semiconducting inorganic nanocrystals, which under
• Photon excitation emit radiation in the range of 750-1800 nm.
• the invention further relates to an optical security feature on at least one surface of the surface of a product which contains semiconducting inorganic nanocrystals which, when excited by photons, emit radiation in the range of 750-1800 nm.
• the optical security feature is preferably printed on at least one area of the surface of the product using the method according to the invention.
• the present invention further relates to a serialization and / or track & trace system which contains an optical security feature including a unique code as described herein, which is printed on a product.
• the invention relates to the use of a unique code printed on a product, as described herein, as an optical security feature in a serialization and / or track & trace system.
• the unique code here is made using the one described herein
• Ink formulation containing semiconducting inorganic nanocrystals which, when excited by photons, emit radiation in the range of 750-1800 nm, printed on the product or the product packaging.
• FIGS. 2 a-d show examples of a one-dimensional bar code printed on white cardboard.
• FIGS. 3 a-c show further examples of a two-dimensional QR code printed on white cardboard.
• the ink formulation had the following ingredients:
• the proportion of inorganic nanocrystals in the ink formulation is thus 0.6%.
• the viscosity of this ink formulation is 11 mPa * s
• This worry number is primarily determined by the viscosity and surface tension of the ink formulation.
• FIGS. 2 a-c a bar code was printed by means of an inkjet printer in different resolutions of 350 dpi (FIG. 2 a), 400 dpi (FIG. 2 b) and 450 dpi (FIG. 2 c).
• the color pigments present in the ink formulation mean that the code can be recognized by the human eye at any time.
• the code in FIG. 2c was additionally illuminated with white LED light and the emitted radiation was detected in the NIR range.
• FIG. 2 d shows a recording of the fluorescence radiation emitted by the ink formulation in the NIR range.
• a QR code was printed by means of an inkjet printer in different resolutions of 400 dpi (FIG. 3 a), 450 dpi (FIG. 3 b) and 500 dpi (FIG. 3 c).
• the color pigments present in the ink formulation mean that the code can be recognized by the human eye at any time.
• FIGS. 4 a and b show examples of individual printing inaccuracies or printing defects of a single printer, which can be used as an individual and unique pattern for generating a unique code.
• the print image in FIG. 4 a was produced with the printer LP50 from Süss MicroTec and the print head from Spectra SE128 AA from Fujifilm.
• the ink formulation was the Spectra test ink Blue, also from Fujifilm.
• the recordings were made with the Printview camera of the LP50.
• the graduation marks of the “crosshairs” have a scale of 100 ⁇ m.
• the substrate was photo paper. An individual pattern of appears within a series of pressure points Elevation shifts. In particular, the third to last pressure point in a row has a significant height difference to its neighboring points.
• the print image in FIG. 4 b was produced with the printer LP50 and the print head from Spectra SE128 AA.
• the ink formulation was a mixture of SPR001 (commercial fluorescent polymer from Merck), chlorobenzene, mesitylene and tetralin.
• the images were taken with the acA 1300gc camera from Basler (lens focal length: 200mm) at 2x magnification. Image section 6x4mm.
• the substrate was photo paper. Within a row of pressure points, an individual pattern of height shifts, flaws and omissions can be seen at a smaller magnification than in FIG. 4 a.

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• Inks, Pencil-Leads, Or Crayons (AREA)
• Credit Cards Or The Like (AREA)
• Investigating, Analyzing Materials By Fluorescence Or Luminescence (AREA)
• Luminescent Compositions (AREA)

Applications Claiming Priority (2)

Publications (1)

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• 2019
  • 2019-10-17 DE DE102019216003.4A patent/DE102019216003B4/de active Active
• 2020
  • 2020-09-24 EP EP20780186.1A patent/EP4045330A1/de active Pending
  • 2020-09-24 US US17/766,333 patent/US20240051327A1/en active Pending
  • 2020-09-24 WO PCT/EP2020/076720 patent/WO2021073848A1/de unknown
  • 2020-09-24 JP JP2022522251A patent/JP7387889B2/ja active Active

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