DE2423086A1 - Verfahren zur bildung eines ueberzugs aus aktiviertem aluminiumoxyd auf der oberflaeche eines feuerfesten koerpers - Google Patents
Verfahren zur bildung eines ueberzugs aus aktiviertem aluminiumoxyd auf der oberflaeche eines feuerfesten koerpersInfo
- Publication number
- DE2423086A1 DE2423086A1 DE2423086A DE2423086A DE2423086A1 DE 2423086 A1 DE2423086 A1 DE 2423086A1 DE 2423086 A DE2423086 A DE 2423086A DE 2423086 A DE2423086 A DE 2423086A DE 2423086 A1 DE2423086 A1 DE 2423086A1
- Authority
- DE
- Germany
- Prior art keywords
- aluminum oxide
- mixture
- activated
- weight
- carrier
- 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- Withdrawn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
- 238000000034 method Methods 0.000 title claims description 26
- 239000011248 coating agent Substances 0.000 title claims description 18
- 238000000576 coating method Methods 0.000 title claims description 18
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 title description 3
- 230000009970 fire resistant effect Effects 0.000 title 1
- 239000000203 mixture Substances 0.000 claims description 50
- PNEYBMLMFCGWSK-UHFFFAOYSA-N Alumina Chemical compound [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 claims description 47
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 claims description 25
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 claims description 16
- 239000002253 acid Substances 0.000 claims description 6
- 239000011230 binding agent Substances 0.000 claims description 6
- 238000004519 manufacturing process Methods 0.000 claims description 5
- 230000004913 activation Effects 0.000 claims description 4
- 238000001035 drying Methods 0.000 claims description 4
- 239000000853 adhesive Substances 0.000 claims description 3
- 230000001070 adhesive effect Effects 0.000 claims description 3
- 239000003513 alkali Substances 0.000 claims description 3
- 230000003213 activating effect Effects 0.000 claims description 2
- 239000000126 substance Substances 0.000 claims description 2
- 101100240595 Mus musculus Nipal4 gene Proteins 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 description 20
- 239000003054 catalyst Substances 0.000 description 10
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 9
- 238000002156 mixing Methods 0.000 description 9
- 239000002245 particle Substances 0.000 description 9
- 230000000694 effects Effects 0.000 description 8
- 238000010438 heat treatment Methods 0.000 description 8
- KWYUFKZDYYNOTN-UHFFFAOYSA-M Potassium hydroxide Chemical compound [OH-].[K+] KWYUFKZDYYNOTN-UHFFFAOYSA-M 0.000 description 6
- 238000002474 experimental method Methods 0.000 description 6
- QGZKDVFQNNGYKY-UHFFFAOYSA-N ammonia Natural products N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 5
- 229910052878 cordierite Inorganic materials 0.000 description 5
- JSKIRARMQDRGJZ-UHFFFAOYSA-N dimagnesium dioxido-bis[(1-oxido-3-oxo-2,4,6,8,9-pentaoxa-1,3-disila-5,7-dialuminabicyclo[3.3.1]nonan-7-yl)oxy]silane Chemical compound [Mg++].[Mg++].[O-][Si]([O-])(O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2)O[Al]1O[Al]2O[Si](=O)O[Si]([O-])(O1)O2 JSKIRARMQDRGJZ-UHFFFAOYSA-N 0.000 description 5
- 238000006243 chemical reaction Methods 0.000 description 4
- 239000000843 powder Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 238000002485 combustion reaction Methods 0.000 description 3
- 239000007789 gas Substances 0.000 description 3
- VEXZGXHMUGYJMC-UHFFFAOYSA-N Hydrochloric acid Chemical compound Cl VEXZGXHMUGYJMC-UHFFFAOYSA-N 0.000 description 2
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- CDBYLPFSWZWCQE-UHFFFAOYSA-L Sodium Carbonate Chemical compound [Na+].[Na+].[O-]C([O-])=O CDBYLPFSWZWCQE-UHFFFAOYSA-L 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 150000007513 acids Chemical class 0.000 description 2
- CNLWCVNCHLKFHK-UHFFFAOYSA-N aluminum;lithium;dioxido(oxo)silane Chemical compound [Li+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O CNLWCVNCHLKFHK-UHFFFAOYSA-N 0.000 description 2
- 229910021529 ammonia Inorganic materials 0.000 description 2
- 239000001099 ammonium carbonate Substances 0.000 description 2
- 235000012501 ammonium carbonate Nutrition 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000001879 gelation Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229910052863 mullite Inorganic materials 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Chemical group [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 description 2
- 239000007787 solid Substances 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 229910052644 β-spodumene Inorganic materials 0.000 description 2
- OSWFIVFLDKOXQC-UHFFFAOYSA-N 4-(3-methoxyphenyl)aniline Chemical compound COC1=CC=CC(C=2C=CC(N)=CC=2)=C1 OSWFIVFLDKOXQC-UHFFFAOYSA-N 0.000 description 1
- ATRRKUHOCOJYRX-UHFFFAOYSA-N Ammonium bicarbonate Chemical compound [NH4+].OC([O-])=O ATRRKUHOCOJYRX-UHFFFAOYSA-N 0.000 description 1
- VHUUQVKOLVNVRT-UHFFFAOYSA-N Ammonium hydroxide Chemical compound [NH4+].[OH-] VHUUQVKOLVNVRT-UHFFFAOYSA-N 0.000 description 1
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 1
- 241001579678 Panthea coenobita Species 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 239000011324 bead Substances 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000018109 developmental process Effects 0.000 description 1
- 239000002612 dispersion medium Substances 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000008187 granular material Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036571 hydration Effects 0.000 description 1
- 238000006703 hydration reaction Methods 0.000 description 1
- 230000005012 migration Effects 0.000 description 1
- 238000013508 migration Methods 0.000 description 1
- 238000001556 precipitation Methods 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000000746 purification Methods 0.000 description 1
- 239000011214 refractory ceramic Substances 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- VQBIMXHWYSRDLF-UHFFFAOYSA-M sodium;azane;hydrogen carbonate Chemical compound [NH4+].[Na+].[O-]C([O-])=O VQBIMXHWYSRDLF-UHFFFAOYSA-M 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/45—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements
- C04B41/50—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials
- C04B41/5025—Coating or impregnating, e.g. injection in masonry, partial coating of green or fired ceramics, organic coating compositions for adhering together two concrete elements with inorganic materials with ceramic materials
- C04B41/5031—Alumina
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B41/00—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone
- C04B41/80—After-treatment of mortars, concrete, artificial stone or ceramics; Treatment of natural stone of only ceramics
- C04B41/81—Coating or impregnation
- C04B41/85—Coating or impregnation with inorganic materials
- C04B41/87—Ceramics
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Inorganic Chemistry (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Environmental & Geological Engineering (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Analytical Chemistry (AREA)
- General Chemical & Material Sciences (AREA)
- Oil, Petroleum & Natural Gas (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Catalysts (AREA)
- Exhaust Gas Treatment By Means Of Catalyst (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP48058127A JPS507792A (en, 2012) | 1973-05-24 | 1973-05-24 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2423086A1 true DE2423086A1 (de) | 1974-12-19 |
Family
ID=13075302
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2423086A Withdrawn DE2423086A1 (de) | 1973-05-24 | 1974-05-13 | Verfahren zur bildung eines ueberzugs aus aktiviertem aluminiumoxyd auf der oberflaeche eines feuerfesten koerpers |
Country Status (6)
| Country | Link |
|---|---|
| US (1) | US4231900A (en, 2012) |
| JP (1) | JPS507792A (en, 2012) |
| AU (1) | AU462294B2 (en, 2012) |
| DE (1) | DE2423086A1 (en, 2012) |
| FR (1) | FR2230601B1 (en, 2012) |
| GB (1) | GB1461837A (en, 2012) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0045126A1 (en) * | 1980-06-25 | 1982-02-03 | Imperial Chemical Industries Plc | Catalytic process for producing hydrogen |
| US4460704A (en) * | 1980-06-15 | 1984-07-17 | Imperial Chemical Industries Plc | Catalyst for the production of hydrogen |
| DE3821496A1 (de) * | 1988-06-25 | 1989-12-28 | Ego Elektro Blanc & Fischer | Temperaturschalter |
| CN103848450A (zh) * | 2012-11-29 | 2014-06-11 | 沈阳工业大学 | 一种耐高温高比表面积活性氧化铝的制备方法 |
Families Citing this family (28)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2575396B2 (fr) * | 1977-04-12 | 1987-04-30 | Commissariat Energie Atomique | Procede de fabrication de membranes minerales poreuses et permeables |
| JPS605424B2 (ja) * | 1978-11-09 | 1985-02-12 | 本田技研工業株式会社 | 研削整用半球形砥石の砥粒電着装置 |
| JPS577881A (en) * | 1980-06-19 | 1982-01-16 | Kyatara Kogyo Kk | Manufacture of active aluminum clad layer on ceramic substrate |
| FR2512004A1 (fr) * | 1981-08-27 | 1983-03-04 | Rhone Poulenc Spec Chim | Composition d'alumine pour le revetement d'un support de catalyseur, son procede de fabrication et le support de catalyseur obtenu |
| JPS5998737A (ja) * | 1982-11-29 | 1984-06-07 | Mazda Motor Corp | モノリス触媒担体の製造法 |
| NL8303079A (nl) * | 1983-09-05 | 1985-04-01 | Stichting Energie | Werkwijze voor de bereiding van scheurvrije semi-permeabele anorganische membranen. |
| JPS61161143A (ja) * | 1984-12-29 | 1986-07-21 | Kawasaki Steel Corp | 排ガス中一酸化炭素酸化触媒および排ガス中の一酸化炭素酸化方法 |
| US4609563A (en) * | 1985-02-28 | 1986-09-02 | Engelhard Corporation | Metered charge system for catalytic coating of a substrate |
| US4921731A (en) * | 1986-02-25 | 1990-05-01 | University Of Florida | Deposition of ceramic coatings using sol-gel processing with application of a thermal gradient |
| US4714694A (en) * | 1986-06-30 | 1987-12-22 | Engelhard Corporation | Aluminum-stabilized ceria catalyst compositions, and methods of making the same |
| US4759950A (en) * | 1986-09-26 | 1988-07-26 | Advance Technology Materials, Inc. | Method for metallizing filaments |
| US4839402A (en) * | 1986-09-26 | 1989-06-13 | Advanced Technology Materials, Inc. | Sol gel formation of polysilicate, titania, and alumina interlayers for enhanced adhesion of metal films on substrates |
| JPH07112533B2 (ja) * | 1987-01-08 | 1995-12-06 | 三菱重工業株式会社 | セラミツク多孔質膜の製造方法 |
| NL8702759A (nl) * | 1987-11-19 | 1989-06-16 | Hoogovens Groep Bv | Werkwijze voor het vervaardigen van een micro-permeabel membraan en inrichting voor het aanbrengen van deze membraan op een drager. |
| US4983423A (en) * | 1988-05-24 | 1991-01-08 | Ceramem Corporation | Method of forming a porous inorganic membrane on a porous support using a reactive inorganic binder |
| US5114901A (en) * | 1991-02-19 | 1992-05-19 | General Motors Corporation | Ceramic coating for a catalyst support |
| US5512324A (en) * | 1994-11-14 | 1996-04-30 | General Motors Corporation | Metal substrate with insulative coating thereon and method of making the same |
| US5676745A (en) * | 1995-06-07 | 1997-10-14 | The United States Of America, As Represented By The Secretary Of Commerce | Pre-ceramic polymers in fabrication of ceramic composites |
| ES2200903T3 (es) * | 1999-07-28 | 2004-03-16 | Sud-Chemie Inc. | Catalizadores de hidrogenacion. |
| JP2001226173A (ja) * | 1999-12-07 | 2001-08-21 | Denso Corp | ハニカム構造体の製造方法 |
| DE19962544A1 (de) * | 1999-12-23 | 2001-07-19 | Degussa | Verfahren zum Beschichten eines keramischen Wabenkörpers |
| JP4355469B2 (ja) * | 2002-03-08 | 2009-11-04 | 日本碍子株式会社 | アルミナ担持担体、触媒体及びアルミナ担持担体の製造方法 |
| US6903051B2 (en) * | 2002-04-12 | 2005-06-07 | Corning Incorporated | In situ theta alumina coated monolithic catalyst supports |
| EP1699554A4 (en) * | 2003-12-31 | 2007-12-26 | Corning Inc | CERAMIC STRUCTURES WITH HYDROPHOBIC COATINGS |
| JP4495576B2 (ja) * | 2004-05-07 | 2010-07-07 | 朝日化学工業株式会社 | 触媒体担持基材 |
| US8911824B2 (en) * | 2008-12-31 | 2014-12-16 | Zircoa, Inc. | Method of impregnating crucibles and refractory articles |
| CN103508755A (zh) * | 2012-06-18 | 2014-01-15 | 苏州忠辉蜂窝陶瓷有限公司 | 一种在堇青石蜂窝陶瓷上涂覆氧化铝涂层的方法 |
| US11857950B2 (en) * | 2020-11-17 | 2024-01-02 | Battelle Memorial Institute | Hydrothermally and thermally stable catalytic materials based on theta-alumina |
Family Cites Families (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR1231993A (fr) * | 1958-08-13 | 1960-10-04 | Basf Ag | Procédé pour la production de globules renfermant de l'alumine |
| US3013903A (en) * | 1959-04-13 | 1961-12-19 | Du Pont | Fibrous substrate with an alumina bonded organic polymer coating |
| US3013901A (en) * | 1959-11-30 | 1961-12-19 | Du Pont | Article coated with fibrous boehmite |
| GB1018034A (en) * | 1961-09-27 | 1966-01-26 | British Petroleum Co | Thin film alumina catalysts |
| US3246197A (en) * | 1962-10-02 | 1966-04-12 | Westinghouse Electric Corp | Cathode heater having an aluminum oxide and tungesten coating |
| US3565830A (en) * | 1963-02-07 | 1971-02-23 | Engelhard Min & Chem | Coated film of catalytically active oxide on a refractory support |
| GB1052105A (en, 2012) * | 1963-05-09 | |||
| US3447893A (en) * | 1966-02-04 | 1969-06-03 | Ethyl Corp | Oxidation catalysts |
| US3554929A (en) * | 1967-06-08 | 1971-01-12 | Du Pont | High surface area alumina coatings on catalyst supports |
| US3734767A (en) * | 1970-06-18 | 1973-05-22 | Kaman Sciences Corp | Ceramic treating process and product produced thereby |
| US3690921A (en) * | 1970-12-07 | 1972-09-12 | Ibm | Method for strongly adhering a metal film on ceramic substrates |
| US3767453A (en) * | 1971-06-30 | 1973-10-23 | Universal Oil Prod Co | Method of depositing a high surface area alumina film on a relatively low surface area support |
| GB1321520A (en) * | 1971-10-21 | 1973-06-27 | Inst Gornogo Dela Im Aa Skochi | Method of manufacturing sensitive members for thermochemical devices for gas analysis |
| US3926702A (en) * | 1972-03-29 | 1975-12-16 | Asamura Patent Office | Ceramic structures and process for producing the same |
| US3842017A (en) * | 1972-12-13 | 1974-10-15 | Corning Glass Works | Process for depositing noble metal catalysts on oxide carriers |
| US3870545A (en) * | 1973-07-23 | 1975-03-11 | Gulf Research Development Co | Process for coating a catalyst support |
| US4062810A (en) * | 1974-03-14 | 1977-12-13 | Hoechst Aktiengesellschaft | Carrier-supported catalyst |
-
1973
- 1973-05-24 JP JP48058127A patent/JPS507792A/ja active Pending
-
1974
- 1974-05-02 GB GB1929274A patent/GB1461837A/en not_active Expired
- 1974-05-06 AU AU68632/74A patent/AU462294B2/en not_active Expired
- 1974-05-13 DE DE2423086A patent/DE2423086A1/de not_active Withdrawn
- 1974-05-17 FR FR7417320A patent/FR2230601B1/fr not_active Expired
-
1978
- 1978-03-31 US US05/892,035 patent/US4231900A/en not_active Expired - Lifetime
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4460704A (en) * | 1980-06-15 | 1984-07-17 | Imperial Chemical Industries Plc | Catalyst for the production of hydrogen |
| EP0045126A1 (en) * | 1980-06-25 | 1982-02-03 | Imperial Chemical Industries Plc | Catalytic process for producing hydrogen |
| DK157185B (da) * | 1980-06-25 | 1989-11-20 | Ici Ltd | Katalytisk fremgangsmaade til fremstilling af en hydrogenstroem og fremgangsmaade til rensning heraf |
| DE3821496A1 (de) * | 1988-06-25 | 1989-12-28 | Ego Elektro Blanc & Fischer | Temperaturschalter |
| CN103848450A (zh) * | 2012-11-29 | 2014-06-11 | 沈阳工业大学 | 一种耐高温高比表面积活性氧化铝的制备方法 |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1461837A (en) | 1977-01-19 |
| US4231900A (en) | 1980-11-04 |
| JPS507792A (en, 2012) | 1975-01-27 |
| AU462294B2 (en) | 1975-06-19 |
| FR2230601A1 (en, 2012) | 1974-12-20 |
| AU6863274A (en) | 1975-06-19 |
| FR2230601B1 (en, 2012) | 1977-06-24 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| 8141 | Disposal/no request for examination |