EP3983120A1 - Rührer, rührsystem und verfahren zur drahtlosen und/oder batterielosen messung von prozessparametern - Google Patents
Rührer, rührsystem und verfahren zur drahtlosen und/oder batterielosen messung von prozessparameternInfo
- Publication number
- EP3983120A1 EP3983120A1 EP20732874.1A EP20732874A EP3983120A1 EP 3983120 A1 EP3983120 A1 EP 3983120A1 EP 20732874 A EP20732874 A EP 20732874A EP 3983120 A1 EP3983120 A1 EP 3983120A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- stirrer
- sensor
- designed
- parameters
- antenna
- 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.)
- Withdrawn
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/80—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis
- B01F27/90—Mixers with rotary stirring devices in fixed receptacles; Kneaders with stirrers rotating about a substantially vertical axis with paddles or arms
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/051—Stirrers characterised by their elements, materials or mechanical properties
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F33/00—Other mixers; Mixing plants; Combinations of mixers
- B01F33/45—Magnetic mixers; Mixers with magnetically driven stirrers
- B01F33/452—Magnetic mixers; Mixers with magnetically driven stirrers using independent floating stirring elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/211—Measuring of the operational parameters
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/212—Measuring of the driving system data, e.g. torque, speed or power data
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/21—Measuring
- B01F35/214—Measuring characterised by the means for measuring
- B01F35/2142—Measuring characterised by the means for measuring using wireless sensors introduced in the mixture, e.g. transponders or RFID tags, for measuring the parameters of the mixture or components to be mixed
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F35/00—Accessories for mixers; Auxiliary operations or auxiliary devices; Parts or details of general application
- B01F35/20—Measuring; Control or regulation
- B01F35/22—Control or regulation
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F23/00—Mixing according to the phases to be mixed, e.g. dispersing or emulsifying
- B01F23/20—Mixing gases with liquids
- B01F23/23—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids
- B01F23/233—Mixing gases with liquids by introducing gases into liquid media, e.g. for producing aerated liquids using driven stirrers with completely immersed stirring elements
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01F—MIXING, e.g. DISSOLVING, EMULSIFYING OR DISPERSING
- B01F27/00—Mixers with rotary stirring devices in fixed receptacles; Kneaders
- B01F27/05—Stirrers
- B01F27/11—Stirrers characterised by the configuration of the stirrers
- B01F27/112—Stirrers characterised by the configuration of the stirrers with arms, paddles, vanes or blades
Definitions
- the exemplary embodiments of the invention relate to a stirrer for wireless and / or battery-free measurement of process parameters as well as a stirring system with such a stirrer and a method for using such a stirrer in a stirring system.
- Stirrers for the production or conversion of substances by circulating or mixing the substances have been known for a long time. They are used, for example, in the production of polymers in chemical reactors or vessels for stirring. During production and in laboratory test stands, precise control of process parameters - primarily temperature - is desirable in order to achieve or optimize a certain quality and quantity. It is not possible to use radio systems such as Bluetooth, WiFi or ZigBee to transmit radio signals from a sensor, because the high process temperatures mean that the energy supply in the closed reactor cannot be ensured via batteries and the radio signal cannot penetrate the reactor due to its metallic structure can. Furthermore, substances are often used which react in aqueous solution and which attenuate the radio signal so strongly that, for example, no signals can be transmitted from the bottom of the chemical reactor.
- thermocouples - are brought into the chemical reactor by cables in order to record a temperature of the substances or the process during operation.
- Such thermocouples often disrupt the process and make handling and cleaning of the stirrers and chemical reactors more difficult.
- the temperature measuring rods influence or hinder the reaction to be checked and / or contaminate the starting materials in the vessel of the reactor due to old adhesions. It is therefore desirable to provide a stirrer or a stirring system which enables flexible use and simple handling in chemical reactors for the conversion and simultaneous detection of parameters of substances and their reaction.
- the stirrer should also be able, as an alternative or in addition to this, to record and / or transfer parameters of the stirrer or the stirring system itself.
- the proposed stirrer is designed to move in a vessel in order to circulate at least one substance, the stirrer having at least one sensor which is designed to measure parameters of the circulation process and / or parameters of the substance and / or parameters of a reaction and / or to detect parameters of the stirrer, for example for monitoring the apparatus, and wherein the stirrer is designed to wirelessly transmit sensor signals from the at least one sensor to an evaluation device.
- a particular advantage of this stirrer is that its structure is less complex compared to conventional stirrers or stirrers with sensors. As a result, installation space can be saved and a chemical reactor provided with such a stirrer can be used more efficiently.
- the possibility of equipping the stirrer with several sensors means that measurements can be carried out particularly precisely.
- An advantageous aspect of the measurement with different sensors is that a plausibility check of the individual measurements can also be carried out with one another or with one another. It is useful to arrange the individual sensors at different points on the stirrer. For example, it is advisable to arrange sensors that detect the parameters of the stirrer themselves, where, for example, high mechanical loads occur. As a result, the stirrer can be operated optimally below its mechanical load capacity. Temperature sensors or those that record parameters of a concentration of the substances to be circulated should be arranged, for example, in the vicinity of the extremities of a rotating circulator of the stirrer, since the substances moved by the stirrer are driven due to their inertia by a centrifugal force of the rotating circulator into the edge regions of a vessel receiving them.
- a stirring system which comprises: a stirrer, as mentioned above and described below in further exemplary embodiments; a vessel designed to receive the stirrer and the materials to be circulated by the stirrer; a drive that is designed to drive the stirrer.
- Yet another aspect of the invention relates to a method for stirring or circulating at least one substance, a stirrer, as mentioned above and described below in further exemplary embodiments, being moved, for example rotated, in a vessel in order to circulate at least one substance, and during the movement of the stirrer, a sensor signal picked up by a sensor arranged in or on the stirrer is transmitted wirelessly to an evaluation device.
- stirrer according to its different exemplary embodiments are also to be related to the stirring system provided with such a stirrer, as well as to the method for an operation for determining parameters with such a stirrer or stirring system and vice versa.
- the stirrer is designed to wirelessly receive the energy required to operate the at least one sensor. Due to the wireless structure, the agitator's freedom of movement is greater compared to a conventional wired structure.
- a stirrer whose sensor can record the energy wirelessly can also be made more compact than conventional stirrers. It is particularly advantageous to supply the sensor inductively or inductively resonant with energy in a near field. Alternatively or additionally, the sensor can also be operated in the UHF range by means of an electric field. The Contactless transmission of the parameters of the sensor takes place via electromagnetic waves in the near field and / or far field.
- the stirrer in addition or as an alternative to the wireless supply of energy to the sensor, the stirrer according to yet another preferred exemplary embodiment comprises a transmission device which is designed to output and / or transmit the detected parameters wirelessly.
- a contactless transmission of the parameters of the sensor is possible, for example, via electromagnetic waves in a near field and / or far field.
- the at least one sensor is expediently designed to detect the parameters continuously or intermittently.
- a continuous detection of the parameters is particularly advantageous if the substances circulated or mixed with the stirrer react quickly, in other words, the reaction speed of the circulated substances is high.
- Intermittent recording of parameters is particularly advantageous when the reaction rate of the circulated substances is low.
- the amount of measured data can be minimized and the energy expenditure required for acquiring or transmitting the data of the parameters can thereby also be reduced.
- it is possible, in intermittent operation of the stirrer to alternately supply the sensor with energy and / or to detect and / or transmit parameters with the sensor.
- the at least one sensor is designed to include one or more of the following parameters such as: temperature, pressure, humidity, magnetic field strength / flux, pH value, acceleration, concentration of a substance or mixture of substances, ... and to capture / sense the like.
- the stirrer is designed to be driven without contact. Such a drive can take place, for example, inductively or magnetically by means of an alternating field.
- This exemplary embodiment is in turn particularly advantageous if the stirrer can be designed to be particularly compact and space-saving.
- it allows complete contactless integration into a vessel of a reactor or into the substance to be circulated or mixed. This minimizes the effect of external influences on the reaction or the substances to be circulated.
- the stirrer comprises a circulator for circulating the substances and a coupling device which is connected to the circulator in a first area thereof and which has a second area of the coupling device which is spaced from the first area and which is designed with to be coupled to an antenna for the transmission of sensor signals and / or energy, and / or a mechanical drive.
- the circulator can be driven, for example, via an axle which is coupled to the circulator.
- the coupling takes place in a second area of the circulator, the second area being connected to the first area of the circulator.
- the second area can be configured to be coupled to an antenna for the transmission of sensor signals and / or energy.
- This provides two dedicated areas of the stirrer coupling device for different specific tasks. This is particularly advantageous because different suitable materials can be selected when designing the stirrer, taking into account its special tasks or areas of activity. For example, corrosion-resistant and mechanically resilient materials are used for the first area, which is connected to the circulator, since the circulator is in direct contact with the substances to be circulated. For the transmission of energy or sensor signals, materials can be used that conduct and / or transmit electromagnetic signals particularly well. In an even more preferred embodiment, only the first area of the coupling device of the stirrer is designed to be immersed in a substance to be stirred.
- the second area of the coupling device which is assigned for the transmission of the sensor signals and / or the energy for the sensors, should be kept away from negative influences - signal damping - of the substances to be circulated. It has been shown that, in the case of highly aqueous solutions, only the second area still provides satisfactory transmission rates for the signals of the coupling area of the stirrer transmitted by the sensor.
- the antenna for the transmission of sensor signals is expediently arranged closer to the second region of the coupling device with the mechanical drive than the at least one sensor. Such an arrangement is advantageous when the sensor is located below a material level. If an antenna were located below the surface of the material to be circulated, the sensor signals would no longer be transmitted reliably.
- the stirring system comprises a transmission device with a stationary antenna, which is coupled to an evaluation device.
- a stationary antenna With the stationary antenna, a wireless coupling of the stirrer sensors with an evaluation device can be ensured.
- a stationary antenna is required for a stirrer if the stirrer is located inside a vessel made of an electrically conductive material - a Faraday cage.
- an arrangement of the stationary antenna in the second area of the coupling device which is located outside of the substances to be circulated, ensures that the sensor signals to be transmitted are not influenced.
- the arrangement of the stationary antenna in the second area of the coupling device also prevents the antenna from influencing the properties of the substances to be circulated or reacting.
- the antenna can simultaneously transmit the sensor signals and transmit energy to the Sensors are used in the stirrer.
- energy stores for example batteries, which would be necessary to supply the sensors in the stirrer.
- the stirrer can be made more compact, the complexity of its components decreasing and thus the susceptibility of the stirrer or the stirring system to errors being reduced;
- the batteries housed in stirrers fail at high temperatures, with the detection of parameters of the sensor and the transmission of signals then no longer possible.
- the stationary antenna is arranged around a mechanical coupling device, for example concentrically.
- the stationary antenna has a winding arranged around the mechanical coupling device. This makes it possible to implement an antenna for the transmission of signals and / or energy from the stirrer sensors in the simplest possible way.
- the agitator has an antenna arranged around the mechanical coupling device for transmitting the sensor signals to the stationary antenna.
- the coupling device is designed as a drive shaft of the circulator.
- An antenna for transmitting signals and / or energy from the sensors of the stirrer can be implemented in the simplest manner in that the antenna has a winding arranged around the mechanical coupling device.
- An antenna of the stirrer and an antenna coupled to the evaluation device are expediently arranged such that an electrically non-conductive area of the vessel is located between the antennas. This can ensure that transmission is possible without a cable feed-through or contacting.
- the viewing window can be between the stationary transmitter / receiver or the sensor and the antenna of the evaluation device. This enables reliable hermetic separation between the inside of the vessel and an external environment around the vessel without cable feed-throughs.
- the stationary antenna of the sensor can also be located outside the vessel if the sensor can be transmitted to the stationary antenna of the sensor via a viewing window.
- the antenna of the stirrer and / or the antenna of the evaluation device are surrounded by a casing made of a mechanical and / or chemically resistant material - in relation to the at least one substance to be circulated - is produced.
- Encapsulation with a chemically resistant material, for example Teflon can protect the antenna of the evaluation device or antenna of the sensor system from reacting substances and thereby ensure reliable transmission of signals or parameters of the sensor.
- the stirring system includes an evaluation device which is set up to evaluate the parameters detected by the at least one sensor. This not only makes it possible to record the parameters of the reaction, but also to control the stirring system itself or the stirrer, for example by moving the stirrer more slowly in order to be able to influence the reaction itself.
- the entire reaction process of the substances circulated by the stirrer can be specifically tracked and / or controlled at the same time. For example, a process temperature in a chemical reactor provided with the stirrer could be controlled by means of a heating device of the reactor.
- the evaluation device is designed to receive the parameters transmitted by the transmission device of the stirrer without contact.
- the drive of the stirrer is designed to drive the stirrer without contact.
- the stirrer itself can be made more compact. Suitable drives for this can be magnetic and electro-inductive. These are particularly robust and easy to care for and, moreover, cost-saving. Maintenance of the stirrer itself is also easier.
- a contactless drive can be used for a large number of different stirrers, which increases the efficiency when using such a drive.
- the sensor arranged in or on the stirrer is located in an area of the stirrer surrounded by the at least one substance to be circulated during the movement of the stirrer, at least during the movement of the Stirrer, if necessary also in the idle state, an antenna via which the sensor signals are wirelessly transmitted to the evaluation device, at least partially outside an area surrounded by the at least one material to be circulated, for example above a material level of the material to be circulated.
- Fig. 1 is a perspective view of a stirrer according to a
- Embodiment; 2 shows a perspective view of a stirring system with a stirrer according to an advantageous embodiment.
- the stirrer 100 comprises two sensors 110, 120 which are arranged on / in blades or blades of the stirrer 100.
- the blades or blades form a circulator 130 of the stirrer 100 for the at least one substance to be circulated.
- the number of sensors 110, 120 is not reduced to two, but can be increased or decreased to meet the needs for detecting and evaluating the parameters required.
- the two sensors 110 and 120 can be sensors of the same or different types. With sensors 110, 120 of the same type, for example, a plausibility check can take place during the acquisition and evaluation of the parameters acquired by sensors 110, 120.
- the stirrer 100 shown in FIG. 1 has a coupling device 150 with which the stirrer can be connected, for example, to a mechanical drive.
- the stirrer 100 can be driven, for example, via a magnetic or electro-inductive drive 500, without having to be coupled to a drive via a mechanical connection.
- the drive 500 is shown greatly simplified in FIG. 1 as a plate.
- a contactless drive 500 is particularly advantageous when an undesired interaction occurs due to contact of a substance to be circulated with the stirrer 100 or its drive, which could influence the parameters detected by the sensors 110, 120.
- the stirrer 100 according to the exemplary embodiment from FIG. 1 can be designed to be particularly compact.
- the stirrer 100 also has a Transmission device 160, with which a contactless transmission of signals or of the parameters detected by the sensors 110, 120 is possible.
- Coupling device 150 is additionally or alternatively designed to receive energy for sensors 110, 120 and / or transmission device 160. This is particularly advantageous because it makes it possible to dispense with batteries in the stirrer 100, which would be destroyed at high temperatures.
- the transmission device 160 is designed to transmit the recorded parameters of the sensors 110, 120 to an evaluation device 400 for further processing - for example via an antenna 450.
- the transmission device 160 is designed as a wireless transmitter or transceiver .
- the coupling device 150 and the transmission device 160 are a single device.
- this single device for example, energy transmission and parameter transmission can take place simultaneously.
- construction space can be saved again, which is available, for example, for further sensors that can be accommodated in the stirrer 100.
- the stirrer 100 can be made even more compact and smaller than stirrers that are operated by a battery.
- space saved due to the lack of batteries can be provided for the provision of a computation logic, the recorded parameters of the sensors 110, 120 already being evaluated by the arithmetic logic integrated in the stirrer 100 and sent directly to an evaluation device 400 can be transmitted.
- FIG. 2 illustrates a further exemplary embodiment of a stirrer 100 which is integrated in a stirring system 1000.
- the stirring system further comprises a vessel 200 which is designed to receive the stirrer 100 and the substances 300 to be circulated by the stirrer 100.
- the stirring system 1000 comprises a drive 500, which is indicated in FIG. 2 as a broken axis - with a predetermined direction of rotation.
- the drive 500 can be, for example, an electric motor that drives the axis of the stirrer 100.
- the stirring system 1000 has an evaluation device 400, which has a stationary antenna 450 as a coupling device, which can be coupled to a stationary antenna 155 of the coupling device 150 of the stirrer 100.
- the antenna 450 of the evaluation device 400 or the antenna 155 of the stirrer 100 is arranged stationary and coaxially or concentrically around the drive axis of the stirrer 100.
- Such an arrangement is advantageous when the stirrer 100 or its sensors 110, 120 is located in an electrically conductive vessel 200, for example a metal vessel.
- the vessel 200 is a metallic cylinder in which at least one substance 300 is circulated by the blades or blades of the stirrer 100.
- the stirrer 100 has a circulator 130 with two blades and an axis that adjoins the stirrer 100 and can be mechanically connected to the drive 500.
- the sensors 110, 120 are arranged in a region 151 of the axis of the drive 500 which is below a level of the at least one substance 300 to be circulated.
- a region 151 of the stirrer 100 which is used for detecting the parameters of the substance 300 by means of the sensors 110, 120, is immersed in the substance 300.
- the coupling device 150 or antenna 160 for transmitting the sensor signals and / or energy is arranged in an area 152 above the surface of the material, so that the antenna 160 does not come into contact with the material 300.
- the coupling device 150 of the stirrer 100 is designed to receive energy for the sensors 110, 120 and to pass it on to them. Accordingly, it is not necessary to provide batteries in the vicinity of the sensors 110, 120 in the exemplary embodiment according to FIG. 2. As already described above, batteries can be destroyed, particularly at high temperatures of the substances 300 to be circulated, which can occur, for example, in an exothermic reaction, with the detection and transmission of parameters that are detected by the sensors 110, 120 being no longer possible .
- the signals or parameters of the substances 300 received by the evaluation device 400 can be evaluated for further use and / or serve to control the circulation process in the vessel 200 of the stirring system 1000. So for example, according to an advantageous embodiment, a reaction of one or more substances 300 taking place in the vessel 200 can be influenced in real time by the evaluation device 400 controlling the drive 500 of the stirrer 100 or a heating device of the vessel 200 via an interface - not shown here.
- the stirrer 100, the coupling device 150 or the antenna 155 of the stirrer 100 and / or the antenna 450 of the evaluation device 400 can be protected from reactive substances 300 by encapsulation with a chemically and / or mechanically resistant material.
- coupling device transmission device or antenna for
Landscapes
- Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Mixers Of The Rotary Stirring Type (AREA)
- Accessories For Mixers (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102019208738.8A DE102019208738A1 (de) | 2019-06-14 | 2019-06-14 | Rührer zur drahtlosen und/oder batterielosen Messung von Prozessparametern |
| PCT/EP2020/066361 WO2020249766A1 (de) | 2019-06-14 | 2020-06-12 | Rührer, rührsystem und verfahren zur drahtlosen und/oder batterielosen messung von prozessparametern |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| EP3983120A1 true EP3983120A1 (de) | 2022-04-20 |
Family
ID=71094364
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| EP20732874.1A Withdrawn EP3983120A1 (de) | 2019-06-14 | 2020-06-12 | Rührer, rührsystem und verfahren zur drahtlosen und/oder batterielosen messung von prozessparametern |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20220097013A1 (de) |
| EP (1) | EP3983120A1 (de) |
| DE (1) | DE102019208738A1 (de) |
| WO (1) | WO2020249766A1 (de) |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE19843689A1 (de) * | 1998-09-24 | 2000-03-30 | Basf Ag | Verfahren zur Parametermessung in Reaktoren mit beweglichen Rührern |
| DE102008038833B4 (de) * | 2008-08-13 | 2014-02-27 | Hans Heidolph Gmbh & Co. Kg | Laborrührer |
| DE102012008611B4 (de) * | 2012-04-27 | 2017-03-23 | Ika-Werke Gmbh & Co. Kg | Magnetrührer |
| DE102013010275C5 (de) * | 2013-06-18 | 2016-09-15 | Ika-Werke Gmbh & Co. Kg | Magnetrührer mit SAW-Sensor |
| DE102016103456B4 (de) * | 2016-02-26 | 2018-12-13 | Sartorius Stedim Biotech Gmbh | Rührwerk mit Sensor, insbesondere für einen Bioreaktor |
| WO2018014031A1 (en) * | 2016-07-15 | 2018-01-18 | Gate Scientific, Inc. | Wirelessly sensing properties of a closed environment and devices thereof |
-
2019
- 2019-06-14 DE DE102019208738.8A patent/DE102019208738A1/de not_active Withdrawn
-
2020
- 2020-06-12 WO PCT/EP2020/066361 patent/WO2020249766A1/de not_active Ceased
- 2020-06-12 EP EP20732874.1A patent/EP3983120A1/de not_active Withdrawn
-
2021
- 2021-12-13 US US17/549,339 patent/US20220097013A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| WO2020249766A1 (de) | 2020-12-17 |
| DE102019208738A1 (de) | 2020-12-17 |
| US20220097013A1 (en) | 2022-03-31 |
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