CN111040516A - Rare-earth anti-fake inkpad - Google Patents
Rare-earth anti-fake inkpad Download PDFInfo
- Publication number
- CN111040516A CN111040516A CN201911392642.XA CN201911392642A CN111040516A CN 111040516 A CN111040516 A CN 111040516A CN 201911392642 A CN201911392642 A CN 201911392642A CN 111040516 A CN111040516 A CN 111040516A
- Authority
- CN
- China
- Prior art keywords
- rare earth
- inkpad
- spectrum
- counterfeiting
- traceability
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052761 rare earth metal Inorganic materials 0.000 title claims abstract description 106
- 150000002910 rare earth metals Chemical class 0.000 title claims abstract description 106
- 239000000843 powder Substances 0.000 claims abstract description 75
- 238000001228 spectrum Methods 0.000 claims abstract description 57
- 230000003595 spectral effect Effects 0.000 claims abstract description 34
- 239000000463 material Substances 0.000 claims abstract description 33
- 239000000376 reactant Substances 0.000 claims abstract description 24
- 238000012360 testing method Methods 0.000 claims abstract description 19
- 230000032683 aging Effects 0.000 claims abstract description 13
- 238000002156 mixing Methods 0.000 claims description 10
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 239000000203 mixture Substances 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 229910001404 rare earth metal oxide Inorganic materials 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000001035 drying Methods 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 238000004806 packaging method and process Methods 0.000 description 2
- 238000003756 stirring Methods 0.000 description 2
- 230000003712 anti-aging effect Effects 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000000969 carrier Substances 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000009413 insulation Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000010422 painting Methods 0.000 description 1
- 230000000737 periodic effect Effects 0.000 description 1
- 238000007639 printing Methods 0.000 description 1
- 238000004886 process control Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 238000004659 sterilization and disinfection Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 238000010998 test method Methods 0.000 description 1
- 238000011179 visual inspection Methods 0.000 description 1
Images
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/50—Sympathetic, colour changing or similar inks
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09D—COATING COMPOSITIONS, e.g. PAINTS, VARNISHES OR LACQUERS; FILLING PASTES; CHEMICAL PAINT OR INK REMOVERS; INKS; CORRECTING FLUIDS; WOODSTAINS; PASTES OR SOLIDS FOR COLOURING OR PRINTING; USE OF MATERIALS THEREFOR
- C09D11/00—Inks
- C09D11/02—Printing inks
- C09D11/03—Printing inks characterised by features other than the chemical nature of the binder
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Wood Science & Technology (AREA)
- Organic Chemistry (AREA)
- Physics & Mathematics (AREA)
- Health & Medical Sciences (AREA)
- Spectroscopy & Molecular Physics (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Inks, Pencil-Leads, Or Crayons (AREA)
Abstract
The rare earth anti-counterfeiting inkpad adopts the rare earth anti-counterfeiting material which is the combination of rare earth powder, rare earth powder oxide, rare earth powder reactant, rare earth powder oxide and rare earth powder reactant, the mixture ratio is used as a spectrum traceability material, a spectrum testing method is adopted to test and record the spectrum traceability material, the inkpad and the rare earth anti-counterfeiting inkpad of the mixed spectrum traceability material, the seal carrier using the inkpad, the seal and the spectrum spectral line of the seal carrier after aging treatment, the spectrum spectral lines are compared, the spectrum instrument testing and identification of the spectrum traceability evidence chain of the rare earth anti-counterfeiting inkpad are realized by directly reading the spectrum traceability typical spectrum spectral line consistency, the anti-counterfeiting inkpad can be customized, the anti-counterfeiting inkpad of the rare earth can be produced in a standardized, generalized, serialized and industrialized manner, the product traceability of a manufacturing mechanism and the seal traceability of a customized user can be widely applied to the anti-counterfeiting traceability of the inkpad and derivative products thereof, the sample is not damaged, and the uniqueness is identified by comparing the spectra.
Description
Technical Field
The invention belongs to the technical field of anti-counterfeiting tracing of inkpad, and particularly relates to a rare earth anti-counterfeiting inkpad which adopts rare earth, rare earth oxide, rare earth reactant and combined powder of the rare earth and the rare earth oxide as a spectrum tracing material.
Background
The existing inkpad has no function of tracing the source seal, and is used for testing the seal picture and tracing the authenticity of the picture, the rapid development of the existing electronic seal technology overturns the seal picture tracing identification method, in particular to the seal imprint of highly-imitated calligraphy and painting works, the seal imprint of the electronic seal adopts the universal seal picture tracing identification, the tracing conclusion can not be obtained, and at present, the spectrum tracing method is not adopted, and the anti-counterfeiting inkpad using the inkpad spectrum line method and research information report are not seen in the test of the seal.
Disclosure of Invention
The method comprises the steps of adopting the combination of rare earth powder, rare earth powder oxide, rare earth powder reactant, rare earth powder oxide and rare earth powder reactant, mixing and proportioning to serve as a spectrum traceability material, utilizing a typical spectrum line of the rare earth traceability material, adopting a spectrum testing method to test and record spectrum traceability material, inkpad, rare earth anti-counterfeiting inkpad of the mixed spectrum traceability material, an inkpad carrier using the inkpad, the spectrum line of the inkpad carrier after the inkpad and aging treatment, comparing the spectrum lines, and directly reading the spectrum traceability typical spectrum line consistency.
The invention has the following features:
1. the combination of rare earth powder, rare earth powder oxide, rare earth powder reactant, rare earth powder oxide and rare earth powder reactant is mixed and proportioned to serve as a spectrum tracing material source.
The spectrum test method is adopted to test and record the spectrum spectral lines of the rare earth anti-counterfeiting inkpad of the spectrum tracing material, the inkpad and the mixed spectrum tracing material, the seal carrier using the inkpad, the seal and the seal carrier after aging treatment, and the consistency of the typical spectrum spectral lines of the spectrum tracing is compared by directly reading the spectrum.
The drawings illustrate the following:
FIG. 1 is a schematic diagram of the control principle of the anti-counterfeit inkpad manufacturing process.
In the figure: 1 is rare earth powder, 2 is rare earth oxide powder, 3 is rare earth reactant powder, 123 is 1, 2, 3 mixture powder, 4 is inkpad, 5 is inkpad of mixed spectrum tracing material, 6 is seal, 7 is seal using spectrum tracing inkpad, and 8 is seal after aging treatment.
The process control in the figure is illustrated as follows:
the materials are physically mixed.
The general solid-liquid mixing and stirring mode is based on the standard that the typical spectral lines can be obtained by sampling tests.
10 spectral lines were tested and the consistency was determined by visual inspection.
And (4) adopting an infrared spotlight to uniformly irradiate the seal part for 10 s.
A disinfection light source with ultraviolet power more than or equal to 5w is adopted, and the vertical irradiation is subject to 4 s.
The method comprises the following steps of firstly carrying out infrared irradiation and then carrying out ultraviolet irradiation.
Technical problem to be solved
Aiming at the defects of the existing inkpad technology, the invention provides the rare earth anti-counterfeiting inkpad which has the advantage of convenience for unique spectrum tracing.
The defect that the current inkpad manufacturers and inkpad users can only carry out source tracing identification through the seal physical character pictures is overcome.
The traceable inkpad manufacturer, inkpad users and seal carriers using the inkpad are traceable by adopting the evidence chain uniqueness of the spectrum traceable spectral line.
The test and identification of identifying the authenticity of the used inkpad seal can be realized without damaging the inkpad seal carrier.
According to the technology, trace rare earth powder, rare earth powder oxide, rare earth powder reactant and rare earth powder thereof, rare earth powder oxide and the combined powder of the rare earth powder reactant are physically added into the original finished inkpad, and typical spectral lines are revealed according to different types of added substances, so that the rare earth anti-counterfeiting inkpad which is traceable in a manufacturing plant, traceable in a user side and traceable in a carrier is realized, and the rare earth anti-counterfeiting inkpad can be widely applied to occasions needing carrier file seal anti-counterfeiting.
(II) technical scheme
In order to achieve the purpose, the invention provides the following technical scheme: and mixing the components of the rare earth powder, the rare earth powder oxide, the rare earth powder reactant and the rare earth powder thereof, the rare earth powder oxide and the combination of the rare earth powder reactant with the inkpad, testing and recording the combination powder spectral lines of the rare earth powder, the rare earth powder oxide, the rare earth powder reactant and the rare earth powder thereof, the rare earth powder oxide and the rare earth powder reactant as true values of traceability comparison.
And testing and recording the inkpad spectral line as a true value of tracing comparison.
And testing and recording the truth value of quantitatively using the seal impression spectral line of the inkpad as source tracing comparison.
And testing and recording the seal spectral line of the rare earth anti-counterfeiting inkpad quantitatively used after the aging treatment as a true value of traceability comparison.
The particle size of the spectrum tracing material of the rare earth anti-counterfeiting inkpad is powder ranging from the minimum particle size to the maximum particle size of the viscous inkpad material.
The rare earth anti-counterfeiting inkpad is prepared from a spectrum tracing material which is a combination powder of rare earth powder, rare earth powder oxide, a rare earth powder reactant and rare earth powder thereof, rare earth powder oxide and a rare earth powder reactant; editing the mixture ratio combination method, and customizing the rare earth anti-counterfeiting inkpad.
The rare earth anti-counterfeiting inkpad adopts the aging method of the inkpad seal area as infrared heating aging and ultraviolet irradiation aging.
(III) advantageous effects
Compared with the prior art, the rare earth anti-counterfeiting inkpad provided by the invention has the following beneficial effects:
1. the method comprises the steps of mixing the components of rare earth powder, rare earth powder oxide, rare earth powder reactant, rare earth powder oxide and rare earth powder reactant with inkpad, and tracing the inkpad at a manufacturing factory end, the inkpad customized at a user end and the inkpad used for bearing object signet by using the intrinsic spectral line of a spectrum tracing material.
2. The inkpad has the advantages that the combination powder of trace rare earth powder, rare earth powder oxide, rare earth powder reactant and rare earth powder, rare earth powder oxide and rare earth powder reactant is adopted, the spectrum traceability function of the inkpad is improved, the color quality of the inkpad is improved, the traceability of a manufacturer product is realized, the inkpad special for a user is customized, and the authenticity of the inkpad seal can be used according to the intrinsic spectrum line traceability bearing object of the rare earth spectrum traceability material.
3. The traceability test does not damage the sample.
4. And the anti-aging parameter quality of the seal is improved.
5. The produced inkpad derivative can synchronously realize spectrum tracing.
6. The market of the rare earth material in the field of document identification and seal imprint identification spectrum traceability is developed.
7. The whole process of the spectral traceability industrialization technical route and the innovative method of the file identification and the seal identification are developed.
8. And creating a rare earth spectrum traceability spectral line library.
The technical solutions in the embodiments of the present invention are clearly and completely described below, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments.
All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
The implementation steps of the invention are as follows:
1. testing and establishing a combined spectral line library suitable for adding rare earth powder, rare earth powder oxide, rare earth powder reactant and rare earth powder thereof, rare earth powder oxide and rare earth powder reactant to the inkpad.
1.1 establishing a spectral line gallery of various rare earth material powder bodies.
1.2, establishing spectral line libraries of rare earth powder materials with different mixing ratios.
1.3, establishing a spectral line library of the inkpad mixed quantitative rare earth powder material.
1.4, establishing a spectral line library of inkpad mixed quantitative different rare earth powder materials.
1.5 establishing a signature spectral line library of the rare earth anti-counterfeiting inkpad used as a standard carrier.
1.6, establishing a spectral line library of the standard carrier after seal aging treatment by using the rare earth anti-counterfeiting inkpad.
1.7, carrying out data analysis on the spectral line gallery, the inkpad spectral line gallery, the anti-counterfeiting inkpad spectral line gallery and the spectral line gallery of the spectrum traceability material series after the inkpad seal part is aged, and comparing to obtain a traceability comparison conclusion spectral line gallery.
Secondly, selecting rare earth spectrum tracing material control key points
2.1 the grain diameter is matched with the grain diameter of the inkpad.
2.2 the addition amount of the rare earth spectrum tracing material is based on the spectrum tracing of the bearing object.
Thirdly, the key point of the control of the mixing process
3.1 mixing the rare earth spectral source tracing materials with isobaric and isothermal parameters.
Pressure > standard barometric pressure.
The temperature is higher than 100 ℃, and the packaging is carried out after the anaerobic cooling.
3.2 mixing the rare earth spectrum tracing material with the inkpad.
Pressure > standard barometric pressure.
The temperature is more than 40 ℃ below 38 ℃.
And packaging after oxygen insulation and temperature reduction. Mixing with conventional stirring.
Fourthly, using regional aging control key points of the inkpad seal
4.1, adopting the aging treatment of the stamp part of the inkpad and adopting the infrared heating aging treatment and the temperature changing periodic treatment.
4.2 after the seal stamp part is aged, the spectrum test is carried out, the typical peak value of the relative humidity range of 40% -60% is collected, the moisture spectrum is eliminated, and after the drying treatment, the spectrum after the drying is tested and collected is compared.
Fifthly, tracing control key points by using inkpad seal
The carrier of the seal is customized by the use of the seal paste.
The consistency of the spectral lines of the carrier is not more than 0.05%.
I.e. five spectral line profile changes must not occur for ten thousand pages per batch.
The seal carrier using the rare earth anti-counterfeiting inkpad has controlled number of seals, namely, when printing materials in batches, the total seal amount code of the rare earth anti-counterfeiting inkpad used for the carrier is continuously recorded.
When the non-bearing object uses the customized rare earth anti-counterfeiting inkpad, the bearing object is defined as illegal.
When the carrier uses the non-customized rare earth anti-counterfeiting inkpad, the inkpad used by the seal is defined as illegal.
Claims (2)
1. The rare earth anti-counterfeiting inkpad is prepared by mixing and proportioning rare earth powder, rare earth powder oxide, rare earth powder reactant, rare earth powder oxide and rare earth powder reactant to serve as a spectrum tracing material.
2. The rare earth anti-counterfeiting inkpad as claimed in claim 1, which has the following characteristics: and testing and recording the spectral lines of the rare earth anti-counterfeiting inkpad of the spectrum tracing material, the inkpad and the mixed spectrum tracing material, the seal carrier using the inkpad, the seal and the seal carrier after aging treatment by adopting a spectrum testing method, comparing the spectral lines, and directly reading the consistency of typical spectral lines of the spectrum tracing.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911392642.XA CN111040516A (en) | 2019-12-30 | 2019-12-30 | Rare-earth anti-fake inkpad |
| PCT/CN2020/070933 WO2021134808A1 (en) | 2019-12-30 | 2020-01-08 | Rare earth anti-counterfeiting inkpad |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911392642.XA CN111040516A (en) | 2019-12-30 | 2019-12-30 | Rare-earth anti-fake inkpad |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111040516A true CN111040516A (en) | 2020-04-21 |
Family
ID=70241586
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201911392642.XA Pending CN111040516A (en) | 2019-12-30 | 2019-12-30 | Rare-earth anti-fake inkpad |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN111040516A (en) |
| WO (1) | WO2021134808A1 (en) |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580148A (en) * | 2003-10-15 | 2005-02-16 | 湘潭大学 | Cipher-loaded multiple colour-match efficient luminous anticounterfeit ink paste, and its preparation and use |
| WO2009034267A2 (en) * | 2007-07-11 | 2009-03-19 | Chemoptics | Coating containing alkoxysiloxanes for optical identification and traceability |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1297970A (en) * | 1999-11-26 | 2001-06-06 | 北大德力科技有限公司 | Long and short wave anti-fake stamp-pad ink and printing ink |
| CN1357595A (en) * | 2001-12-29 | 2002-07-10 | 中国科学院长春应用化学研究所 | Orgnic RE complex fluorescent material and its prepn and application |
| CN1243077C (en) * | 2003-10-15 | 2006-02-22 | 湘潭大学 | Cipher-loaded multiple colour match efficient luminescence anticounterfeit material, and its preparation and use |
| CN1297627C (en) * | 2004-04-20 | 2007-01-31 | 中国印钞造币总公司 | Machine-readable fluorescence/phosphorescence anti false material, method for fabricating the material and application |
| CN1569981A (en) * | 2004-04-26 | 2005-01-26 | 熊春宁 | Multiple fake-proof print oil with memory code and its checking method |
| CN103875026B (en) * | 2011-09-06 | 2016-10-26 | 德国联邦印制有限公司 | Verify method and apparatus and the application of this device of the secure file with the security feature that form is fluorescent printing element |
| CN104710877B (en) * | 2013-12-16 | 2017-04-05 | 中国人民银行印制科学技术研究所 | A kind of anti-forgery ink |
| CN107586487A (en) * | 2016-12-12 | 2018-01-16 | 广东轻工职业技术学院 | A kind of anti-counterfeiting stamp ink and preparation method thereof |
| CN109504180A (en) * | 2018-12-05 | 2019-03-22 | 赵晓锐 | A kind of ink paste and preparation method thereof |
-
2019
- 2019-12-30 CN CN201911392642.XA patent/CN111040516A/en active Pending
-
2020
- 2020-01-08 WO PCT/CN2020/070933 patent/WO2021134808A1/en active Application Filing
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1580148A (en) * | 2003-10-15 | 2005-02-16 | 湘潭大学 | Cipher-loaded multiple colour-match efficient luminous anticounterfeit ink paste, and its preparation and use |
| WO2009034267A2 (en) * | 2007-07-11 | 2009-03-19 | Chemoptics | Coating containing alkoxysiloxanes for optical identification and traceability |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2021134808A1 (en) | 2021-07-08 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Brosseau et al. | Revealing the invisible: using surface‐enhanced Raman spectroscopy to identify minute remnants of color in Winslow Homer's colorless skies | |
| CN110687106A (en) | Paper-based color-comparison type sensing array label and preparation method and application thereof | |
| CN111458314B (en) | Method for identifying production place of dried orange peel based on autofluorescence-quenching fluorescence splicing spectrum | |
| RU111716U1 (en) | SEMICONDUCTOR DEVICE WITH AUTHENTICITY CONTROL SYSTEM | |
| CN111040516A (en) | Rare-earth anti-fake inkpad | |
| Łydżba‐Kopczyńska et al. | Application of chemometric methods for the determination of fading and age determination of blue ballpoint inks | |
| CN114874501B (en) | Response film for phosphorescence target object, preparation method and detection method thereof | |
| LU500746B1 (en) | A Rare Earth Anti-Counterfeiting Stamp-pad Ink | |
| LU500745B1 (en) | A Rare Earth Anti-Counterfeiting Inkpad | |
| CN111073394A (en) | Rare earth anti-fake stamp-pad ink | |
| CN110823829A (en) | Spectral data compensation method based on SG calibration sheet | |
| CN106950215A (en) | A kind of method of sodium carbonate or sodium acid carbonate content in measure solid sample | |
| JP4471309B2 (en) | Light irradiation radical weathering tester | |
| LU500747B1 (en) | A Type of Printer Toner with the Function of Rare Earth Spectrum Traceability | |
| Ge et al. | Upconverted persistent luminescent Zn 3 Ga 2 SnO 8: Cr 3+, Yb 3+, Er 3+ phosphor for composite anti-counterfeiting ink | |
| CN110589800A (en) | Method for separating and purifying carbon dots of catechol-ethylenediamine | |
| Zhang et al. | Nitrogen and phosphorus‐doped green carbon dots with ‘turn‐off’fluorometric sensor for Fe3+ ions detection | |
| CN111077746A (en) | Rare earth spectrum traceable ink powder for golden light red printer | |
| Pallipurath et al. | A chemometric study of ageing in lead-based paints | |
| CN113789173B (en) | Preparation method and application of edible fungus-based fluorescent carbon quantum dots for indicating freshness of food | |
| Sun et al. | Quantitative definition of strength of chromophores in gemstones and the impact on color change in pyralspite garnets | |
| CN111103774A (en) | Printer powdered ink of rare earth spectrum tracing | |
| US8004668B2 (en) | Fluorescent color calibrator for calibrating RGB pixel values | |
| CN108896491A (en) | A method of identification ink forms the time | |
| Pause et al. | Synthetic organic pigments in talens oil paint 1920–1950–the case of Vermillion imit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20200421 |
|
| WD01 | Invention patent application deemed withdrawn after publication |