CN202109997U - Fuel cell internal transient temperature distribution sensor - Google Patents
Fuel cell internal transient temperature distribution sensor Download PDFInfo
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- CN202109997U CN202109997U CN2011200415976U CN201120041597U CN202109997U CN 202109997 U CN202109997 U CN 202109997U CN 2011200415976 U CN2011200415976 U CN 2011200415976U CN 201120041597 U CN201120041597 U CN 201120041597U CN 202109997 U CN202109997 U CN 202109997U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Abstract
The utility model discloses a fuel cell internal transient temperature distribution sensor which measures the fuel cell internal transient temperature distribution through arranging film thermocouples on ribs among adjacent channels on a graphite flow field plate of a fuel cell. Single film thermocouple is formed by conducting evaporation on four layers of films through vacuum coating technology, wherein the first layer is coated with a silicon dioxide insulating layer with the thickness being of 0.1 to 0.15 micrometer, the second layer is coated with copper, the third layer is coated with nickel, both the thicknesses of the copper coating film and the nickel coating film are 0.08 to 0.1 micrometer, and the last layer is coated with a dioxide insulating thin layer with the thickness being of 0.01 to 0.02 micrometer. The outgoing line of the film thermocouple extends to the edge of the graphite flow field plate through printed circuit process, and is provided with a standard wiring port connected with an external circuit so as to output signals through a data acquisition system. The sensor is simple and practicable to measure the real time temperature distribution inside the fuel cell, and the cell is easy to disassemble and assemble, so that the sensor has small effect on the overall performance of the fuel cell.
Description
Technical field
The utility model belongs to fuel battery inside transient Temperature Distribution sensor, relates to the measurement of fuel battery inside transient Temperature Distribution, particularly a kind of measuring method of transient temperature.
Background technology
Because the structure of fuel cell self makes its inner transient Temperature Distribution measure very difficulty; Temp measuring method in the past is that microminiature temperature sensor or thermopair are implanted in the runner of fuel cell mostly; Or be hot-pressed onto between the diffusion layer and Catalytic Layer of battery, but these method severe exacerbations fuel cell performance.In addition, the thermometry of fuel cell also has the infrared radiation temperature method, because the velocity of propagation of infrared radiation is exactly the light velocity, so the thermometric response time is short, at a distance the temperature of body surface under the noncontact monitoring rugged surroundings.The temperature ratio that adopts this method to measure the fuel cell outside surface is easier to; But the true temperature of expecting fuel battery inside distributes, and needs to change the structure of battery, adopts the end plate of the special material fuel cell that can see through infrared radiation etc.; Therefore processing and fabricating is complicated; Thermometric is inaccurate, especially has under the situation of the globule at fuel battery inside, more can not reflect the real Temperature Distribution of fuel battery inside; And fuel battery inside to have the globule to generate be the phenomenon that all can occur under most operating modes, so the usable range of this method has received certain restriction.
Common temp measuring method also has the heat sensitive paint method, is coated with color method etc., but these methods all can not satisfy the requirement of real-time thermometric, and for the fuel cell particular structural, the use of these methods also is restricted.Therefore, need a kind of for a short time, and respond the Temperature Distribution situation that temp measuring method is rapidly measured fuel battery inside the fuel cell performance influence; Because film thermocouple is the micron order film that is deposited on the surface measurements; Thermal capacity is little, and response speed is exceedingly fast, and time constant can reach the microsecond level; And do not influence the Temperature Distribution of measured surface; Can more directly obtain the transient temperature situation of change of measured surface, and can realize purpose little and that thermometric is fast is disturbed in original work condition environment temperature field, so the application of film thermocouple receives domestic and international researchist's attention day by day.
Therefore the utility model is little according to film-type thermopair volume, fabrication and processing is simple relatively, to measure accurately, can be placed on be the most real temperature of fuel battery inside from the very near position of the membrane electrode assembly of fuel cell, measurement; The advantage very little to the fuel cell overall performance impact; The metallic film thermopair directly is plated on the muscle between the graphite flow field plates adjacent channels of fuel cell; Measure the transient Temperature Distribution of fuel battery inside, the accuracy of measurement is higher, and dismounting cell is easy; And can under the situation that does not influence the normal operation of fuel cell, measure the Temperature Distribution of fuel battery inside in real time.
The utility model content
The purpose of the utility model is to provide a kind of simple fuel battery inside transient Temperature Distribution sensor, comprises graphite flow field plates in the fuel cell, film thermocouple, extension line, the standard connection jaws, the pilot hole that are connected with external circuit.The graphite flow field plates of film thermocouple and fuel cell is made as one, and it is simple in structure, and is easy to use, can measure the Temperature Distribution of fuel battery inside, and need not fuel cell is carried out frequent dismounting.The stationkeeping of film thermocouple on the graphite flow field plates of fuel cell, so between the experimental data before and after the dismounting fuel cell good comparative is arranged.In addition, the transient Temperature Distribution that it can the on-line measurement fuel battery inside.
The technical scheme of the utility model is achieved in that fuel battery inside Temperature Distribution sensor, comprises graphite flow field plates 1, film thermocouple 4, extension line 5, the standard connection jaws 6 that is connected with external circuit, the pilot hole 7 of fuel cell; Graphite flow field plates is provided with runner 2, and muscle 3 is arranged between the runner 2; It is characterized in that: on the muscle 3 between graphite flow field plates 1 adjacent channels 2, be provided with film thermocouple 4, be provided with the standard connection jaws 6 that is connected with external circuit at the end of graphite flow field plates; The edge that the extension line 5 of film thermocouple 4 gauge heads extends to graphite flow field plates links to each other with the standard connection jaws 6 that is connected with external circuit; The membrane electrode assembly 27 of the face of film thermocouple 4 towards fuel cell is set on the graphite flow field plates 1, and after fuel cell assembled, the film thermocouple 4 on the graphite flow field plates contacted with the membrane electrode assembly 27 of fuel cell;
In the described coating material; The simple metal film thermocouple coating that copper and mickel is formed can select for use copper and cobalt, tungsten and nickel, molybdenum and nickel, antimony and cobalt to substitute; Also can adopt metal mixture material such as copper and constantan to substitute, in addition, the silicon dioxide insulating layer material can adopt replacements such as aluminium nitride.
The shape of thermo-electric metal coating can be ellipse, triangle, trapezoidal, rectangle, polygon, waveform and irregularly shaped in the mask.
The shape of graphite flow field plates 1 upper runner 2 can be parallel fluid channels, snakelike single channel runner, snakelike binary channels runner, poroid runner etc.
The extension line 5 of the film thermocouple 4 on the graphite flow field plates 1 is to adopt printed circuit technique to process; Extend to the end of graphite flow field plates 1; The wide of extension line 5 is 0.05-0.1mm; Thickness is no more than 0.2 μ m, and be made up of the four-level membrane that prints on the muscle 3 between 1 two adjacent channels 2 of graphite flow field plates: ground floor is the thick silicon dioxide insulating layer of 0.1-0.15 μ m, and the second layer is the thick thin copper layer of 0.08-0.1 μ m; The 3rd layer is the thick thin gold layer of 0.08-0.1 μ m, and outermost layer is the thick Parylene protective seam of 0.01-0.02 μ m;
Shape, the size of extension line 5 three first layers are identical; Position consistency all extends to the end of graphite flow field plates 1, and last printed layers is identical with three first layers on shape and position; But length is shorter than three first layers, extends to from graphite flow field plates 1 terminal 5-8mm place in addition.
Adopt the Temperature Distribution of the temperature distributing measuring commercial measurement fuel battery inside of the utility model: because film thermocouple is arranged on the muscle of graphite flow field plate runner; Therefore do not influence the transmission of reactive fuel; Do not influence the conduction of current signal yet, very little to the fuel cell overall performance impact.This method can realize the conveniently fast disassembling battery, measures accurately.In addition; The extension line of film thermocouple is drawn through the method for P.e.c.; The end of extension line is provided with the standard connection jaws that is connected with external circuit on graphite flow field plates, and printed layers is very thin, has avoided adopting the macroscopic view lead-in wire to cause the problems such as fuel leak in the fuel cell.The fuel battery inside Temperature Distribution sensor of the utility model; Make the film thermocouple of measurement Temperature Distribution and the graphite flow field plates of fuel cell be made as one; Simple in structure, easy to use, the volume of film thermocouple is little, thermal capacity is little, highly sensitive; The fuel cell that can be used for the difformity runner is applicable to active fuel cell and passive type fuel cell simultaneously.
Description of drawings
Fig. 1 is the synoptic diagram (a standard connection jaws is arranged) that film thermocouple and lead-in wire thereof distribute on the netted runner graphite flow field plates of fuel cell;
Fig. 2 is the synoptic diagram (two standard connection jaws are arranged) that film thermocouple and lead-in wire thereof distribute on the netted runner graphite flow field plates in fuel cell;
Fig. 3 is the structural representation of single film thermocouple gauge head on the graphite flow field plates;
Fig. 4 is the making process flow diagram of single film thermocouple gauge head on the graphite flow field plates;
Fig. 5 is the coating sectional view of graphite flow field plates upper film thermopair gauge head extension line;
Fig. 6 is the placement figure of graphite flow field plates in fuel cell that is coated with film thermocouple;
Fig. 7 is the synoptic diagram that film thermocouple and extension line thereof distribute on the parallel fluid channels graphite flow field plates;
Fig. 8 is the synoptic diagram that film thermocouple and extension line thereof distribute on snake type single channel runner graphite flow field plates;
Fig. 9 is the synoptic diagram that film thermocouple and extension line thereof distribute on snake type binary channels runner graphite flow field plates.
Graphite flow field plates among the figure 1, in the fuel cell, 2, runner, 3, muscle, 4, the film heat flux sensor, 5, lead-in wire, 6, the standard connection jaws that is connected with external circuit, 7, pilot hole;
8-11, each coating mask: 8, silicon dioxide insulating layer mask, 9, the copper plate mask, 10, the nickel coating mask, 11, the silicon dioxide layer of protection mask;
12-15, each coating: 12, silicon dioxide insulating layer, 13, copper plate, 14, nickel coating, 15, silicon dioxide layer of protection;
The manufacturing process of 16-19, film thermocouple gauge head: 16, first step, 17, second step, 18, third step, the 19, the 4th step;
20, the junction of film thermocouple gauge head and its extension line, 21, the node of copper-nickel film thermocouple;
Each printed layers of 22-25, film thermocouple extension line: 22, lead-in wire first floor silicon dioxide insulating layer, 23, lead-in wire second layer printing thin copper layer, 24, the thin gold layer of the 3rd layer of printing of lead-in wire, 25, last strata P-xylene protective seam goes between;
26～34, the two poles of the earth end plate of fuel cell, 27～33, the collector plate of fuel cell, 28, the cathode flow field plate of fuel cell, (29～31), gasket seal, 30, membrane electrode, 32, be coated with the fuel cell graphite flow-field plate of film thermocouple.
Embodiment
Accompanying drawing is the specific embodiment of the utility model;
Below in conjunction with accompanying drawing the content of the utility model is done further to specify:
With reference to figure 1, Fig. 2, shown in Figure 3; The utility model is included in the fuel cell on the graphite flow field plates 1 on the muscle 3 between two adjacent channels 2 and is coated with some film thermocouples 4; The extension line 5 of film thermocouple 4 extends the edge of graphite flow field plates 1, is provided with the standard connection jaws 6 that is connected with external circuit at extension line 5 ends.Film thermocouple 4 of the utility model and extension line 5 thereof all are produced on the graphite flow field plates 1, and extension line 5 extends to the end of graphite flow field plates 1, and wide is 0.05-0.1mm, and thickness is no more than 0.2 μ m.Through the standard data interface 6 that is connected with external circuit, the also Temperature numerical of computing fuel inside battery can be gathered by outside data acquisition and processing (DAP) system, thereby obtains the Temperature Distribution situation of fuel battery inside.
With reference to Fig. 3, shown in Figure 4, the electric conductivity of graphite flow field plates 1 is fine, on the muscle 3 between graphite flow field plates 1 runner 2, utilizes vacuum coating technology to be coated with film thermocouple 4; Film thermocouple 4 forms through the plating four-level membrane: the ground floor plating is thick to be the silicon dioxide insulating layer of 0.1-0.15 μ m; Receive the interference of electrically conductive graphite flow-field plate, second layer copper facing, the 3rd layer of nickel plating for fear of the electric signal of film thermocouple conduction; The coating film thickness of copper and mickel is 0.08-0.1 μ m; Copper and mickel constitutes film thermocouple, and the 4th layer of thick thin layer of silicon dioxide of plating 0.01-0.02 μ m is used for protecting the thermopair gauge head, plays the effect of insulation simultaneously.And drawing of circular so that extension line 5 done in extension line 5 and the junction 20 of thermopair gauge head, and 21 is the node of copper-nickel film thermocouple among the figure, and 13 is copper plate, and 14 is nickel coating.Wherein the coating shape of copper-nickel thermopair is by the decision of the shape of mask; There is the place of mask just not have coating; There is not the place of mask that coating is just arranged; The shape of the coat of metal can change as required, can be shape shown in Figure 4, also can be ellipse, triangle, trapezoidal, rectangle, polygon, waveform and irregularly shaped etc.
With reference to shown in Figure 5; The extension line 5 of film thermocouple 4 is on the muscle 3 between graphite flow field plates 1 adjacent channels 2, to adopt printed circuit technique to make; Ground floor prints the silicon dioxide insulating layer of thick 0.1-0.15 μ m, and the second layer prints the thin copper layer of thick 0.08-0.1 μ m, the 3rd layer of thin gold layer that printing 0.08-0.1 μ m is thick; Print the Parylene protective seam of thick 0.01 μ m at last; The three first layers of extension line 5 is identical on length and width, all extends to the end of graphite flow field plates 1, and last layer protective layer length is shorter than three first layers with three first layers is identical on width; Extend to from graphite flow field plates 1 terminal 5-8mm place in addition, extension line 5 wide 0.05-0.1mm.The thermoelectrical potential of each film thermocouple 4 is connected with data collecting instrument and data handling system through the standard connection jaws 6 that is connected with external circuit signal is spread out of.
With reference to shown in Figure 6, be coated with at fuel cell on the graphite flow field plates 32 of film thermocouple 4 film thermocouple 4 is arranged face towards membrane electrode assembly 30.26 and 34 is the two poles of the earth end plate of fuel cell among the figure; 27 and 33 is the collector plate of fuel cell, and 28 is the cathode flow field plate of fuel cell, and 29 and 31 is gasket seal; 30 is membrane electrode; 32 for being coated with the anode of fuel cell graphite flow field plates of film thermocouple, plays the effect of conduction current simultaneously, and wherein the runner of fuel cell flow field board can be serpentine flow path, parallel fluid channels, poroid runner etc.; Be coated with the graphite flow field plates of film thermocouple shown in can image pattern 6 in the anode setting of fuel cell, measure the Temperature Distribution situation of anode-side; Also can at yin, yang the two poles of the earth of fuel cell the graphite flow field plates that is coated with film thermocouple be set simultaneously, measure the Temperature Distribution at fuel cell yin, yang the two poles of the earth respectively.
Fig. 7 is the distribution schematic diagram of the parallel fluid channels graphite flow field plates upper film thermopair of fuel cell; On the muscle 3 between the adjacent channels 2 on the graphite flow field plates 1 of parallel fluid channels, adopt vacuum coating technology to be provided with film thermocouple 4; In the manufacturing process of film thermocouple 4; At first to plate the skim silicon dioxide insulating layer; In order to prevent that signal that film thermocouple 4 transmits from receiving the interference of electrically conductive graphite flow-field plate 1, the extension line 5 of film thermocouple 4 is to adopt printed circuit technique to draw, and the end of extension line 5 and graphite flow field plates 1 is provided with the standard connection jaws 6 that is connected with external circuit.
Fig. 8 is the layout synoptic diagram of the snake type single channel runner graphite flow field plates 1 upper film thermopair 4 of fuel cell; Be provided with film thermocouple 4 on the muscle 3 between the adjacent channels 2 on the graphite flow field plates 1 of snake type runner; Its extension line 5 adopts printed circuit techniques to make, and is provided with the standard connection jaws 6 that is connected with external circuit at the end of extension line 5 and graphite flow field plates 1.
Fig. 9 is the layout synoptic diagram of the snake type binary channels runner graphite flow field plates 1 upper film thermopair 4 of fuel cell; Be provided with film thermocouple 4 on the muscle 3 between the adjacent channels 2 on the graphite flow field plates 1 of snake type runner; Its extension line 5 adopts printed circuit techniques to make, and is provided with the standard connection jaws 6 that is connected with external circuit at the end of extension line 5 and graphite flow field plates 1.
The utility model is to carry out the measurement of fuel battery inside temperature through evaporated film thermopair on the muscle between the graphite flow field plates adjacent channels of fuel cell; Can be separately on the negative electrode of fuel cell or anode flow field board, the Temperature Distribution situation that film thermocouple is measured fuel cell negative and positive the two poles of the earth respectively be set; Also can be simultaneously on the graphite flow field plates at negative and positive the two poles of the earth of fuel cell the evaporated film thermopair obtain the Temperature Distribution situation at fuel cell negative and positive the two poles of the earth; This measuring technique becomes one temperature distribution measuring apparatus and fuel cell making; Dismounting cell is easy, convenient measurement, and processing and fabricating is simple; For same fuel cell, COMPARISON OF CALCULATED RESULTS WITH EXPERIMENTAL DATA property is stronger before and after dismounting.
Claims (5)
1. fuel battery inside transient Temperature Distribution sensor comprises graphite flow field plates (1), film thermocouple (4), extension line (5), the standard connection jaws (6) that is connected with external circuit, the pilot hole (7) of fuel cell; Graphite flow field plates is provided with runner (2), and muscle (3) is arranged between the runner (2); It is characterized in that: on the muscle (3) between graphite flow field plates (1) adjacent channels (2), be provided with film thermocouple (4), be provided with the standard connection jaws (6) that is connected with external circuit at the end of graphite flow field plates; The edge that the extension line (5) of film thermocouple (4) gauge head extends to graphite flow field plates links to each other with the standard connection jaws (6) that is connected with external circuit; The membrane electrode assembly (27) of the face of film thermocouple (4) towards fuel cell is set on the graphite flow field plates (1), and after fuel cell assembled, the film thermocouple on the graphite flow field plates (4) contacted with the membrane electrode assembly (27) of fuel cell;
Film thermocouple (4) on the graphite flow field plates (1) is to adopt the muscle (3) between two adjacent channels of vacuum coating technology (2) to be provided with four-level membrane coating: the shape of coating is provided with according to mask; There is the place of mask just not have coating, do not have the place of mask that coating is just arranged; At first according to the mask shape that is provided with; Between the coat of metal of thermopair gauge head and graphite flow field plates, be coated with the thick silicon dioxide insulating layer of 0.1-0.15 μ m that is; On silicon dioxide insulating layer, be coated with the thick copper plate of 0.08-0.1 μ m that is; Copper plate be shaped as the bar shaped that is parallel to each other; On silicon dioxide insulating layer, be provided with the nickel coating of the one-tenth parallel striped that is connected mutually with existing copper plate head and the tail then, nickel coating thickness is 0.08-0.1 μ m, the end to end formation copper of copper plate and nickel coating-nickel film thermocouple; The last silicon dioxide layer of protection that above copper-nickel coat of metal, is coated with thick 0.01-0.02 μ m is made into circle in the junction (20) of thermopair gauge head and its extension line (5).
2. fuel battery inside transient Temperature Distribution sensor according to claim 1; It is characterized in that: in the described coating material; The simple metal film thermocouple coating that copper and mickel is formed can select for use copper and cobalt, tungsten and nickel, molybdenum and nickel, antimony and cobalt to substitute; Also can adopt the metal mixture material substitution, in addition, the silicon dioxide insulating layer material can adopt aluminium nitride to replace.
3. fuel battery inside transient Temperature Distribution sensor according to claim 1 is characterized in that: the shape of thermo-electric metal coating can be ellipse, triangle, trapezoidal, rectangle, polygon, waveform in the mask.
4. fuel battery inside transient Temperature Distribution sensor according to claim 1 is characterized in that: the shape of graphite flow field plates (1) upper runner (2) can be parallel fluid channels, snakelike single channel runner, snakelike binary channels runner, poroid runner.
5. fuel battery inside transient Temperature Distribution sensor according to claim 1; It is characterized in that: the extension line (5) of the film thermocouple (4) on the graphite flow field plates (1) is to adopt printed circuit technique to process; Extend to the end of graphite flow field plates (1); The wide of extension line (5) is 0.05-0.1mm; Thickness is no more than 0.2 μ m, and the four-level membrane of being gone up printing by the muscle (3) between (1) two adjacent channels of graphite flow field plates (2) constitutes: ground floor is the thick silicon dioxide insulating layer of 0.1-0.15 μ m, and the second layer is the thick thin copper layer of 0.08-0.1 μ m; The 3rd layer is the thick thin gold layer of 0.08-0.1 μ m, and outermost layer is the thick Parylene protective seam of 0.01-0.02 μ m;
Shape, the size of extension line (5) three first layers are identical; Position consistency all extends to the end of graphite flow field plates (1), and last printed layers is identical with three first layers on shape and position; But length is shorter than three first layers, extends to from the terminal 5-8mm place in addition of graphite flow field plates (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200415976U CN202109997U (en) | 2011-02-18 | 2011-02-18 | Fuel cell internal transient temperature distribution sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011200415976U CN202109997U (en) | 2011-02-18 | 2011-02-18 | Fuel cell internal transient temperature distribution sensor |
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| Publication Number | Publication Date |
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| CN202109997U true CN202109997U (en) | 2012-01-11 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2011200415976U Expired - Lifetime CN202109997U (en) | 2011-02-18 | 2011-02-18 | Fuel cell internal transient temperature distribution sensor |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157743A (en) * | 2011-02-18 | 2011-08-17 | 北京工业大学 | Transient temperature distribution sensor in fuel cell |
| CN104360273A (en) * | 2014-11-05 | 2015-02-18 | 北京工业大学 | Fuel cell internal temperature-humidity-heat flux synchronous measurement sensor |
| CN104359571A (en) * | 2014-11-05 | 2015-02-18 | 北京工业大学 | Fuel cell internal temperature-current density distribution measurement male tab |
| CN110243488A (en) * | 2019-06-25 | 2019-09-17 | 西安交通大学 | The plug-in type film thermocouple and preparation method thereof of real-time measurement hydrogen fuel cell internal temperature |
-
2011
- 2011-02-18 CN CN2011200415976U patent/CN202109997U/en not_active Expired - Lifetime
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102157743A (en) * | 2011-02-18 | 2011-08-17 | 北京工业大学 | Transient temperature distribution sensor in fuel cell |
| CN104360273A (en) * | 2014-11-05 | 2015-02-18 | 北京工业大学 | Fuel cell internal temperature-humidity-heat flux synchronous measurement sensor |
| CN104359571A (en) * | 2014-11-05 | 2015-02-18 | 北京工业大学 | Fuel cell internal temperature-current density distribution measurement male tab |
| CN110243488A (en) * | 2019-06-25 | 2019-09-17 | 西安交通大学 | The plug-in type film thermocouple and preparation method thereof of real-time measurement hydrogen fuel cell internal temperature |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20120111 Effective date of abandoning: 20130327 |
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| AV01 | Patent right actively abandoned |
Granted publication date: 20120111 Effective date of abandoning: 20130327 |
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| RGAV | Abandon patent right to avoid regrant |