US20030126796A1 - Fuel gas for a fuel cell - Google Patents
Fuel gas for a fuel cell Download PDFInfo
- Publication number
- US20030126796A1 US20030126796A1 US10/323,976 US32397602A US2003126796A1 US 20030126796 A1 US20030126796 A1 US 20030126796A1 US 32397602 A US32397602 A US 32397602A US 2003126796 A1 US2003126796 A1 US 2003126796A1
- Authority
- US
- United States
- Prior art keywords
- fuel cell
- gas
- fuel
- odor
- odorant
- 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.)
- Abandoned
Links
- 239000000446 fuel Substances 0.000 title claims abstract description 43
- 239000002737 fuel gas Substances 0.000 title claims abstract description 25
- 239000003205 fragrance Substances 0.000 claims abstract description 20
- FERIUCNNQQJTOY-UHFFFAOYSA-N Butyric acid Chemical compound CCCC(O)=O FERIUCNNQQJTOY-UHFFFAOYSA-N 0.000 claims abstract description 16
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 claims abstract description 15
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 12
- 229930195729 fatty acid Natural products 0.000 claims abstract description 12
- 239000000194 fatty acid Substances 0.000 claims abstract description 12
- 239000003054 catalyst Substances 0.000 claims abstract description 11
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 11
- 239000003792 electrolyte Substances 0.000 claims abstract description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 8
- 231100000614 poison Toxicity 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 claims description 4
- 239000012495 reaction gas Substances 0.000 claims description 3
- 230000005611 electricity Effects 0.000 claims description 2
- 125000005313 fatty acid group Chemical group 0.000 claims 1
- 230000007096 poisonous effect Effects 0.000 claims 1
- 239000007789 gas Substances 0.000 abstract description 23
- 231100000572 poisoning Toxicity 0.000 abstract description 4
- 230000000607 poisoning effect Effects 0.000 abstract description 4
- 235000019645 odor Nutrition 0.000 description 19
- 239000002574 poison Substances 0.000 description 5
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 3
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 description 3
- 238000003487 electrochemical reaction Methods 0.000 description 3
- 229910052739 hydrogen Inorganic materials 0.000 description 3
- 239000001257 hydrogen Substances 0.000 description 3
- 229910052717 sulfur Inorganic materials 0.000 description 3
- 239000011593 sulfur Substances 0.000 description 3
- 230000015556 catabolic process Effects 0.000 description 2
- 238000002485 combustion reaction Methods 0.000 description 2
- 238000006731 degradation reaction Methods 0.000 description 2
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 2
- 239000000126 substance Substances 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- LSDPWZHWYPCBBB-UHFFFAOYSA-N Methanethiol Chemical compound SC LSDPWZHWYPCBBB-UHFFFAOYSA-N 0.000 description 1
- 239000002253 acid Substances 0.000 description 1
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000007795 chemical reaction product Substances 0.000 description 1
- 238000006477 desulfuration reaction Methods 0.000 description 1
- 230000023556 desulfurization Effects 0.000 description 1
- 229930195733 hydrocarbon Natural products 0.000 description 1
- 150000002430 hydrocarbons Chemical class 0.000 description 1
- 150000002431 hydrogen Chemical class 0.000 description 1
- 238000010348 incorporation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000003345 natural gas Substances 0.000 description 1
- 229910052760 oxygen Inorganic materials 0.000 description 1
- 239000001301 oxygen Substances 0.000 description 1
- 238000002407 reforming Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L10/00—Use of additives to fuels or fires for particular purposes
- C10L10/02—Use of additives to fuels or fires for particular purposes for reducing smoke development
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L1/00—Liquid carbonaceous fuels
- C10L1/10—Liquid carbonaceous fuels containing additives
- C10L1/14—Organic compounds
- C10L1/18—Organic compounds containing oxygen
- C10L1/188—Carboxylic acids; metal salts thereof
- C10L1/1881—Carboxylic acids; metal salts thereof carboxylic group attached to an aliphatic carbon atom
-
- C—CHEMISTRY; METALLURGY
- C10—PETROLEUM, GAS OR COKE INDUSTRIES; TECHNICAL GASES CONTAINING CARBON MONOXIDE; FUELS; LUBRICANTS; PEAT
- C10L—FUELS NOT OTHERWISE PROVIDED FOR; NATURAL GAS; SYNTHETIC NATURAL GAS OBTAINED BY PROCESSES NOT COVERED BY SUBCLASSES C10G, C10K; LIQUEFIED PETROLEUM GAS; ADDING MATERIALS TO FUELS OR FIRES TO REDUCE SMOKE OR UNDESIRABLE DEPOSITS OR TO FACILITATE SOOT REMOVAL; FIRELIGHTERS
- C10L3/00—Gaseous fuels; Natural gas; Synthetic natural gas obtained by processes not covered by subclass C10G, C10K; Liquefied petroleum gas
- C10L3/003—Additives for gaseous fuels
- C10L3/006—Additives for gaseous fuels detectable by the senses
Definitions
- the invention relates to a fuel gas for a fuel cell, and more particularly to a fuel gas for a fuel cell having an odor by which a gas leakage can be immediately detected.
- a fuel gas for a fuel cell supplied to an anode side of a fuel cell a reformed gas rich in hydrogen obtained by reforming light hydrocarbons such as a hydrogen, a natural gas or a naphtha has been used.
- an odorant is added to such a fuel gas for a fuel cell so that a gas leakage can be easily detected when it occurs.
- Japanese Patent Laid-Open Publication No. 2000-233901 discloses an example of the fuel gas to which a sulfur based odorant is added.
- the invention was made in view of the conventional problems. It is an object of the invention to provide a fuel gas for a fuel cell that does not poison an electrode catalyst and an electrolyte in a fuel cell, and by which a leakage can be easily detected when it occurs.
- a fuel gas for a fuel cell according to the invention is comprising a reaction gas which produces an electricity by a chemical reaction, and an odorant which does not poison an electrode catalyst and an electrolyte, and dissolves in water so that an odor thereof disappears.
- an odorant is added to a fuel gas supplied to a fuel cell in order to easily detect a gas leakage, which makes it possible to detect the gas leakage by the odor when the gas leakage occurs.
- an odorant that does not poison an electrode catalyst or an electrolyte.
- a fatty acid into a reformed hydrogen gas, in a case where a reformer is used as means of producing the fuel gas for a fuel cell mounted on a vehicle.
- some fatty acids having a relatively low carbon number have pungent odors, and are water-solvable. Therefore, although the fuel gas for a fuel cell to which the fatty acid is added has an odor, the fatty acid dissolves in water produced by an electrochemical reaction occurred in the fuel cell, which prevents the odor from remaining in the exhaust gas emitted from the fuel cell. This precludes a possibility that the exhaust gas from the fuel cell is confused with a leaked gas because of its odor. Therefore, it becomes possible to detect the gas leakage, when the fuel gas leaks from the fuel cell.
- the acetic acid or the butyric acid can be exemplified as fatty acids used as the odorants. Both the acetic acid and the butyric acid have strong odors, and also do no poison the electrode catalyst or the electrolyte. Further, the fatty acids dissolve in water produced by the electrochemical reaction of hydrogen and oxygen in the fuel cell, which prevents the exhaust gas from exuding the odor.
- an odor can be added to a fuel gas without poisoning an electrode catalyst and an electrolyte in a fuel cell by employing fatty a acid having an odor such as an acetic acid or a butyric acid as an odorant added to a fuel gas for a fuel cell.
- the odorant dissolves in water produced by an electrochemical reaction, which makes it possible to provide the fuel gas for a fuel cell whose odor does not remain in an exhaust gas emitted from the fuel cell.
Abstract
A fatty acid such as an acetic acid or a butyric acid is added to a fuel gas for a fuel cell as an odorant. This makes it possible to add an odor to the fuel gas without poisoning an electrode catalyst and an electrolyte, and to prevent the odor from remaining in an exhaust gas emitted from the fuel cell.
Description
- The disclosure of Japanese Patent Application No. 2002-003215 filed on Jan. 10, 2002 including the specification, drawings and abstract are incorporated herein by reference in its entirety.
- 1. Field of Invention
- The invention relates to a fuel gas for a fuel cell, and more particularly to a fuel gas for a fuel cell having an odor by which a gas leakage can be immediately detected.
- 2. Description of Related Art
- As a fuel gas for a fuel cell supplied to an anode side of a fuel cell, a reformed gas rich in hydrogen obtained by reforming light hydrocarbons such as a hydrogen, a natural gas or a naphtha has been used. Generally, an odorant is added to such a fuel gas for a fuel cell so that a gas leakage can be easily detected when it occurs.
- For example, Japanese Patent Laid-Open Publication No. 2000-233901 discloses an example of the fuel gas to which a sulfur based odorant is added.
- Conventional odorants added to fuel gases for fuel cell are sulfur based substances such as a mercaptan, as mentioned above. However, it is known that these substances may poison an electrode catalyst or an electrolyte in a fuel cell, which results in degradation in performance of the fuel cell. Therefore, a desulfurizer may be provided in order to remove sulfur components contained in the odorants. However, desulfurization may not be adequately executed, and the above-mentioned problem of poisoning the catalyst cannot be entirely solved.
- In addition, there exists a problem that since the fuel cell does not utilize a combustion reaction unlike an internal combustion engine, the odorant remains in an exhaust gas emitted from the fuel cell, which causes confusion with the gas leakage.
- The invention was made in view of the conventional problems. It is an object of the invention to provide a fuel gas for a fuel cell that does not poison an electrode catalyst and an electrolyte in a fuel cell, and by which a leakage can be easily detected when it occurs.
- In order to attain the above-mentioned object, a fuel gas for a fuel cell according to the invention is comprising a reaction gas which produces an electricity by a chemical reaction, and an odorant which does not poison an electrode catalyst and an electrolyte, and dissolves in water so that an odor thereof disappears.
- According to the above-mentioned structures, it is possible to prevent the odorant from poisoning the electrode catalyst or the electrolyte in the fuel cell, and to easily detect the gas leakage when it occurs. In addition, the odorant dissolves in water so that the odor disappears, which makes it possible to prevent confusion with the gas leakage due to a remaining odor in an exhaust gas.
- Hereinafter, an embodiment according to the invention (hereinafter referred to as embodiments) will be explained.
- As mentioned above, an odorant is added to a fuel gas supplied to a fuel cell in order to easily detect a gas leakage, which makes it possible to detect the gas leakage by the odor when the gas leakage occurs. As mentioned above, it is necessary to employ an odorant that does not poison an electrode catalyst or an electrolyte.
- Also, even after the fuel gas for a fuel cell is supplied to the fuel cell and undergoes a reaction, the odorant does not undergo a reaction and remains unchanged. Therefore, the same odor as that of the fuel gas is imparted to the exhaust gas emitted from the fuel cell, which may cause confusion with the gas leakage. Thus, it is necessary to employ an odorant that does not impart the odor to the exhaust gas emitted from the fuel cell.
- In addition, it is preferable to add a fatty acid into a reformed hydrogen gas, in a case where a reformer is used as means of producing the fuel gas for a fuel cell mounted on a vehicle.
- As a result of a thorough study conducted by the inventors from the above-mentioned each viewpoint, it was found that the fatty acid having an odor is suitable as the odorant.
- When the fatty acid is used as the odorant, degradation in performance can be prevented since the electrode catalyst or the electrolyte in the fuel cell are not poisoned.
- Also, some fatty acids having a relatively low carbon number have pungent odors, and are water-solvable. Therefore, although the fuel gas for a fuel cell to which the fatty acid is added has an odor, the fatty acid dissolves in water produced by an electrochemical reaction occurred in the fuel cell, which prevents the odor from remaining in the exhaust gas emitted from the fuel cell. This precludes a possibility that the exhaust gas from the fuel cell is confused with a leaked gas because of its odor. Therefore, it becomes possible to detect the gas leakage, when the fuel gas leaks from the fuel cell.
- The acetic acid or the butyric acid can be exemplified as fatty acids used as the odorants. Both the acetic acid and the butyric acid have strong odors, and also do no poison the electrode catalyst or the electrolyte. Further, the fatty acids dissolve in water produced by the electrochemical reaction of hydrogen and oxygen in the fuel cell, which prevents the exhaust gas from exuding the odor.
- For example, in the case of the butyric acid, adding approximately 2 to 10 ppm of butyric acid to the fuel gas for a fuel cell allows the fuel gas for a fuel cell to exude the odor that can be sufficiently detected by human nose. Also, since the butyric acid dissolves in reaction product water, no odor remains in the exhaust gas emitted from the fuel cell.
- However, in a case where water is recovered from the exhaust gas from the fuel cell, dissolved fatty acid components need to be removed. Therefore, it is preferable to provide a removal process.
- As explained above, according to the invention, an odor can be added to a fuel gas without poisoning an electrode catalyst and an electrolyte in a fuel cell by employing fatty a acid having an odor such as an acetic acid or a butyric acid as an odorant added to a fuel gas for a fuel cell. Thus, the odorant dissolves in water produced by an electrochemical reaction, which makes it possible to provide the fuel gas for a fuel cell whose odor does not remain in an exhaust gas emitted from the fuel cell.
Claims (3)
1. A fuel gas for a fuel cell comprising:
a reaction gas that is supplied to a fuel cell and produces electricity by a chemical reaction; and
an odorant which is added to the reaction gas, is non-poisonous to an electrode catalyst and an electrolyte in the fuel cell, and dissolves in water so that an odor thereof disappears.
2. The fuel gas for a fuel cell according to claim 1 wherein:
the odorant is a fatty acid having an odor.
3. The fuel gas for a fuel cell according to claim 2 wherein:
the fatty acid is one of an acetic acid and a butyric acid.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US11/176,202 US20050241233A1 (en) | 2002-01-10 | 2005-07-08 | Fuel gas for a fuel cell |
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2002003215A JP2003201487A (en) | 2002-01-10 | 2002-01-10 | Fuel gas for fuel cell |
| JP2002-003215 | 2002-01-10 |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/176,202 Division US20050241233A1 (en) | 2002-01-10 | 2005-07-08 | Fuel gas for a fuel cell |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| US20030126796A1 true US20030126796A1 (en) | 2003-07-10 |
Family
ID=19190852
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US10/323,976 Abandoned US20030126796A1 (en) | 2002-01-10 | 2002-12-20 | Fuel gas for a fuel cell |
| US11/176,202 Abandoned US20050241233A1 (en) | 2002-01-10 | 2005-07-08 | Fuel gas for a fuel cell |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| US11/176,202 Abandoned US20050241233A1 (en) | 2002-01-10 | 2005-07-08 | Fuel gas for a fuel cell |
Country Status (3)
| Country | Link |
|---|---|
| US (2) | US20030126796A1 (en) |
| JP (1) | JP2003201487A (en) |
| DE (1) | DE10300556B4 (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040072050A1 (en) * | 2002-10-11 | 2004-04-15 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| US20100035130A1 (en) * | 2003-09-30 | 2010-02-11 | Honeywell International Inc. | Electrolyte with indicator |
| US20100092835A1 (en) * | 2007-04-12 | 2010-04-15 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| US7794888B2 (en) | 2006-08-04 | 2010-09-14 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| US20110121237A1 (en) * | 2002-08-13 | 2011-05-26 | Enersol, Inc. N.A., L.P. | Hydrogen odorants and odorant selection method |
| US8871392B2 (en) | 2006-08-09 | 2014-10-28 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20040197919A1 (en) * | 2003-04-01 | 2004-10-07 | Herman Gregory S. | Fuel cell leak detection |
| US7851097B2 (en) * | 2006-08-09 | 2010-12-14 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| JP5082759B2 (en) * | 2007-10-23 | 2012-11-28 | トヨタ自動車株式会社 | Fuel cell system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3970745A (en) * | 1974-05-09 | 1976-07-20 | Director-General Of The Agency Of Industrial Science And Technology | Method for producing hydrogen from water |
| US4480017A (en) * | 1982-01-29 | 1984-10-30 | Hitachi, Ltd. | Fuel cell |
| US5830423A (en) * | 1995-11-22 | 1998-11-03 | International Fuel Cells Corp. | Waste gas treatment system |
| US6033794A (en) * | 1997-12-10 | 2000-03-07 | The United States Of America As Represented By The United States Department Of Energy | Multi-stage fuel cell system method and apparatus |
| US6156084A (en) * | 1998-06-24 | 2000-12-05 | International Fuel Cells, Llc | System for desulfurizing a fuel for use in a fuel cell power plant |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5556190A (en) * | 1978-10-23 | 1980-04-24 | Soda Koryo Kk | Odorant for fuel gas |
| JP3378673B2 (en) * | 1994-08-24 | 2003-02-17 | 東京瓦斯株式会社 | Odorant for fuel gas |
| DE19837066A1 (en) * | 1998-08-17 | 2000-02-24 | Haarmann & Reimer Gmbh | Odorizing a gas, e.g. city gas comprises adding an acrylic acid, nitrogen compound and antioxidant to the gas |
| EP1234167A4 (en) * | 1999-11-18 | 2005-06-29 | Mst Technology Gmbh | Optical hydrogen detector |
| US6820464B2 (en) * | 2002-12-16 | 2004-11-23 | Air Products And Chemicals, Inc. | Odorized seals for the detection of gas leak |
-
2002
- 2002-01-10 JP JP2002003215A patent/JP2003201487A/en active Pending
- 2002-12-20 US US10/323,976 patent/US20030126796A1/en not_active Abandoned
-
2003
- 2003-01-09 DE DE10300556A patent/DE10300556B4/en not_active Expired - Fee Related
-
2005
- 2005-07-08 US US11/176,202 patent/US20050241233A1/en not_active Abandoned
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3970745A (en) * | 1974-05-09 | 1976-07-20 | Director-General Of The Agency Of Industrial Science And Technology | Method for producing hydrogen from water |
| US4480017A (en) * | 1982-01-29 | 1984-10-30 | Hitachi, Ltd. | Fuel cell |
| US5830423A (en) * | 1995-11-22 | 1998-11-03 | International Fuel Cells Corp. | Waste gas treatment system |
| US6033794A (en) * | 1997-12-10 | 2000-03-07 | The United States Of America As Represented By The United States Department Of Energy | Multi-stage fuel cell system method and apparatus |
| US6156084A (en) * | 1998-06-24 | 2000-12-05 | International Fuel Cells, Llc | System for desulfurizing a fuel for use in a fuel cell power plant |
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110121237A1 (en) * | 2002-08-13 | 2011-05-26 | Enersol, Inc. N.A., L.P. | Hydrogen odorants and odorant selection method |
| US8394553B2 (en) * | 2002-08-13 | 2013-03-12 | Enersol Inc., N.A.L.P. | Hydrogen odorants and odorant selection method |
| US20040072050A1 (en) * | 2002-10-11 | 2004-04-15 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| US7267901B2 (en) * | 2002-10-11 | 2007-09-11 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| US20100035130A1 (en) * | 2003-09-30 | 2010-02-11 | Honeywell International Inc. | Electrolyte with indicator |
| US7794888B2 (en) | 2006-08-04 | 2010-09-14 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| US8871392B2 (en) | 2006-08-09 | 2014-10-28 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| US20100092835A1 (en) * | 2007-04-12 | 2010-04-15 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
| US8227133B2 (en) | 2007-04-12 | 2012-07-24 | Toyota Jidosha Kabushiki Kaisha | Fuel cell system |
Also Published As
| Publication number | Publication date |
|---|---|
| DE10300556A1 (en) | 2003-07-31 |
| DE10300556B4 (en) | 2004-09-09 |
| JP2003201487A (en) | 2003-07-18 |
| US20050241233A1 (en) | 2005-11-03 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AS | Assignment |
Owner name: TOYOTA JIDOSHI KABUSHIKI KAISHA, JAPAN Free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:HIBINO, KOUETSU;TAKAHASHI, TSUYOSHI;YAGAMI, YUICHI;AND OTHERS;REEL/FRAME:013618/0288 Effective date: 20021125 |
|
| STCB | Information on status: application discontinuation |
Free format text: ABANDONED -- FAILURE TO RESPOND TO AN OFFICE ACTION |