DE2325974A1 - Verfahren zum schliessen der poren von phosphatierten metallen - Google Patents
Verfahren zum schliessen der poren von phosphatierten metallenInfo
- Publication number
- DE2325974A1 DE2325974A1 DE2325974A DE2325974A DE2325974A1 DE 2325974 A1 DE2325974 A1 DE 2325974A1 DE 2325974 A DE2325974 A DE 2325974A DE 2325974 A DE2325974 A DE 2325974A DE 2325974 A1 DE2325974 A1 DE 2325974A1
- Authority
- DE
- Germany
- Prior art keywords
- aluminum
- polymeric aluminum
- polymeric
- solution
- water
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 229910052751 metal Inorganic materials 0.000 title claims description 37
- 239000002184 metal Substances 0.000 title claims description 37
- 238000000034 method Methods 0.000 title claims description 26
- 229910019142 PO4 Inorganic materials 0.000 title description 25
- 239000010452 phosphate Substances 0.000 title description 25
- -1 PHOSPHATE METALS Chemical class 0.000 title description 2
- 239000000243 solution Substances 0.000 claims description 69
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 62
- 239000011148 porous material Substances 0.000 claims description 47
- AZDRQVAHHNSJOQ-UHFFFAOYSA-N alumane Chemical class [AlH3] AZDRQVAHHNSJOQ-UHFFFAOYSA-N 0.000 claims description 45
- 229910052782 aluminium Inorganic materials 0.000 claims description 43
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims description 42
- 238000001035 drying Methods 0.000 claims description 19
- BNGXYYYYKUGPPF-UHFFFAOYSA-M (3-methylphenyl)methyl-triphenylphosphanium;chloride Chemical compound [Cl-].CC1=CC=CC(C[P+](C=2C=CC=CC=2)(C=2C=CC=CC=2)C=2C=CC=CC=2)=C1 BNGXYYYYKUGPPF-UHFFFAOYSA-M 0.000 claims description 12
- VSCWAEJMTAWNJL-UHFFFAOYSA-K aluminium trichloride Chemical compound Cl[Al](Cl)Cl VSCWAEJMTAWNJL-UHFFFAOYSA-K 0.000 claims description 10
- MJWPFSQVORELDX-UHFFFAOYSA-K aluminium formate Chemical compound [Al+3].[O-]C=O.[O-]C=O.[O-]C=O MJWPFSQVORELDX-UHFFFAOYSA-K 0.000 claims description 9
- 150000002739 metals Chemical class 0.000 claims description 8
- VMPIHZLTNJDKEN-UHFFFAOYSA-O triethanolammonium nitrate Chemical compound [O-][N+]([O-])=O.OCC[NH+](CCO)CCO VMPIHZLTNJDKEN-UHFFFAOYSA-O 0.000 claims description 8
- 239000007864 aqueous solution Substances 0.000 claims description 7
- 229920000642 polymer Polymers 0.000 claims description 7
- ZCLVNIZJEKLGFA-UHFFFAOYSA-H bis(4,5-dioxo-1,3,2-dioxalumolan-2-yl) oxalate Chemical compound [Al+3].[Al+3].[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O.[O-]C(=O)C([O-])=O ZCLVNIZJEKLGFA-UHFFFAOYSA-H 0.000 claims description 6
- CECABOMBVQNBEC-UHFFFAOYSA-K aluminium iodide Chemical compound I[Al](I)I CECABOMBVQNBEC-UHFFFAOYSA-K 0.000 claims description 5
- ZRGUXTGDSGGHLR-UHFFFAOYSA-K aluminum;triperchlorate Chemical compound [Al+3].[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O.[O-]Cl(=O)(=O)=O ZRGUXTGDSGGHLR-UHFFFAOYSA-K 0.000 claims description 4
- BDAGIHXWWSANSR-UHFFFAOYSA-M Formate Chemical compound [O-]C=O BDAGIHXWWSANSR-UHFFFAOYSA-M 0.000 claims 1
- JVTAAEKCZFNVCJ-UHFFFAOYSA-M Lactate Chemical compound CC(O)C([O-])=O JVTAAEKCZFNVCJ-UHFFFAOYSA-M 0.000 claims 1
- 239000004922 lacquer Substances 0.000 claims 1
- 238000000576 coating method Methods 0.000 description 31
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 description 24
- 238000000643 oven drying Methods 0.000 description 23
- WNROFYMDJYEPJX-UHFFFAOYSA-K aluminium hydroxide Chemical compound [OH-].[OH-].[OH-].[Al+3] WNROFYMDJYEPJX-UHFFFAOYSA-K 0.000 description 16
- 239000011248 coating agent Substances 0.000 description 14
- 238000011282 treatment Methods 0.000 description 14
- 239000002253 acid Substances 0.000 description 13
- 229910000398 iron phosphate Inorganic materials 0.000 description 11
- 238000012360 testing method Methods 0.000 description 11
- 229910000165 zinc phosphate Inorganic materials 0.000 description 11
- WBJZTOZJJYAKHQ-UHFFFAOYSA-K iron(3+) phosphate Chemical compound [Fe+3].[O-]P([O-])([O-])=O WBJZTOZJJYAKHQ-UHFFFAOYSA-K 0.000 description 10
- 238000004519 manufacturing process Methods 0.000 description 10
- 229910000831 Steel Inorganic materials 0.000 description 9
- ZCDOYSPFYFSLEW-UHFFFAOYSA-N chromate(2-) Chemical compound [O-][Cr]([O-])(=O)=O ZCDOYSPFYFSLEW-UHFFFAOYSA-N 0.000 description 9
- 239000010959 steel Substances 0.000 description 9
- 238000005260 corrosion Methods 0.000 description 8
- LRXTYHSAJDENHV-UHFFFAOYSA-H zinc phosphate Chemical compound [Zn+2].[Zn+2].[Zn+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O LRXTYHSAJDENHV-UHFFFAOYSA-H 0.000 description 8
- 239000000203 mixture Substances 0.000 description 7
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 6
- 230000007797 corrosion Effects 0.000 description 6
- 239000003973 paint Substances 0.000 description 6
- 150000003839 salts Chemical class 0.000 description 6
- 239000007921 spray Substances 0.000 description 6
- 238000003756 stirring Methods 0.000 description 6
- VXYADVIJALMOEQ-UHFFFAOYSA-K tris(lactato)aluminium Chemical compound CC(O)C(=O)O[Al](OC(=O)C(C)O)OC(=O)C(C)O VXYADVIJALMOEQ-UHFFFAOYSA-K 0.000 description 6
- 239000011701 zinc Substances 0.000 description 6
- 229910052725 zinc Inorganic materials 0.000 description 6
- 229910001335 Galvanized steel Inorganic materials 0.000 description 5
- 239000008397 galvanized steel Substances 0.000 description 5
- 238000010438 heat treatment Methods 0.000 description 5
- 239000010935 stainless steel Substances 0.000 description 5
- 229910001220 stainless steel Inorganic materials 0.000 description 5
- KRVSOGSZCMJSLX-UHFFFAOYSA-L chromic acid Substances O[Cr](O)(=O)=O KRVSOGSZCMJSLX-UHFFFAOYSA-L 0.000 description 4
- 150000001875 compounds Chemical class 0.000 description 4
- AWJWCTOOIBYHON-UHFFFAOYSA-N furo[3,4-b]pyrazine-5,7-dione Chemical compound C1=CN=C2C(=O)OC(=O)C2=N1 AWJWCTOOIBYHON-UHFFFAOYSA-N 0.000 description 4
- 239000002244 precipitate Substances 0.000 description 4
- 239000010865 sewage Substances 0.000 description 4
- 239000000126 substance Substances 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 description 3
- 150000008043 acidic salts Chemical class 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 3
- 238000005507 spraying Methods 0.000 description 3
- 239000011550 stock solution Substances 0.000 description 3
- 239000002966 varnish Substances 0.000 description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 239000000853 adhesive Substances 0.000 description 2
- 230000001070 adhesive effect Effects 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 239000013068 control sample Substances 0.000 description 2
- 238000007598 dipping method Methods 0.000 description 2
- 238000011010 flushing procedure Methods 0.000 description 2
- 230000009931 harmful effect Effects 0.000 description 2
- 238000007654 immersion Methods 0.000 description 2
- 239000007788 liquid Substances 0.000 description 2
- 231100000053 low toxicity Toxicity 0.000 description 2
- BDAGIHXWWSANSR-UHFFFAOYSA-N methanoic acid Natural products OC=O BDAGIHXWWSANSR-UHFFFAOYSA-N 0.000 description 2
- 229910017604 nitric acid Inorganic materials 0.000 description 2
- VLTRZXGMWDSKGL-UHFFFAOYSA-N perchloric acid Chemical compound OCl(=O)(=O)=O VLTRZXGMWDSKGL-UHFFFAOYSA-N 0.000 description 2
- KJFMBFZCATUALV-UHFFFAOYSA-N phenolphthalein Chemical compound C1=CC(O)=CC=C1C1(C=2C=CC(O)=CC=2)C2=CC=CC=C2C(=O)O1 KJFMBFZCATUALV-UHFFFAOYSA-N 0.000 description 2
- 231100000614 poison Toxicity 0.000 description 2
- 239000012266 salt solution Substances 0.000 description 2
- 238000004381 surface treatment Methods 0.000 description 2
- 239000002351 wastewater Substances 0.000 description 2
- SMZOUWXMTYCWNB-UHFFFAOYSA-N 2-(2-methoxy-5-methylphenyl)ethanamine Chemical compound COC1=CC=C(C)C=C1CCN SMZOUWXMTYCWNB-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N 2-Propenoic acid Natural products OC(=O)C=C NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 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
- 239000004254 Ammonium phosphate Substances 0.000 description 1
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- 229910001209 Low-carbon steel Inorganic materials 0.000 description 1
- 241001465754 Metazoa Species 0.000 description 1
- 101100400378 Mus musculus Marveld2 gene Proteins 0.000 description 1
- FYXFYDYJMJJDIK-UHFFFAOYSA-N N(CCO)(CCO)CCO.[N+](=O)([O-])[O-].[Al+3].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-] Chemical compound N(CCO)(CCO)CCO.[N+](=O)([O-])[O-].[Al+3].[N+](=O)([O-])[O-].[N+](=O)([O-])[O-] FYXFYDYJMJJDIK-UHFFFAOYSA-N 0.000 description 1
- IOVCWXUNBOPUCH-UHFFFAOYSA-N Nitrous acid Chemical compound ON=O IOVCWXUNBOPUCH-UHFFFAOYSA-N 0.000 description 1
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical compound [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 description 1
- FAPWRFPIFSIZLT-UHFFFAOYSA-M Sodium chloride Chemical compound [Na+].[Cl-] FAPWRFPIFSIZLT-UHFFFAOYSA-M 0.000 description 1
- 239000003929 acidic solution Substances 0.000 description 1
- 229920000180 alkyd Polymers 0.000 description 1
- 229910000148 ammonium phosphate Inorganic materials 0.000 description 1
- 235000019289 ammonium phosphates Nutrition 0.000 description 1
- 239000010953 base metal Substances 0.000 description 1
- 230000001680 brushing effect Effects 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 239000011651 chromium Substances 0.000 description 1
- 239000004927 clay Substances 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000010367 cloning Methods 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
- 239000000470 constituent Substances 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- MNNHAPBLZZVQHP-UHFFFAOYSA-N diammonium hydrogen phosphate Chemical compound [NH4+].[NH4+].OP([O-])([O-])=O MNNHAPBLZZVQHP-UHFFFAOYSA-N 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 235000019253 formic acid Nutrition 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000004519 grease Substances 0.000 description 1
- XMBWDFGMSWQBCA-UHFFFAOYSA-N hydrogen iodide Chemical compound I XMBWDFGMSWQBCA-UHFFFAOYSA-N 0.000 description 1
- CPSYWNLKRDURMG-UHFFFAOYSA-L hydron;manganese(2+);phosphate Chemical compound [Mn+2].OP([O-])([O-])=O CPSYWNLKRDURMG-UHFFFAOYSA-L 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-M hydroxide Chemical compound [OH-] XLYOFNOQVPJJNP-UHFFFAOYSA-M 0.000 description 1
- 238000009776 industrial production Methods 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000011835 investigation Methods 0.000 description 1
- 239000011630 iodine Substances 0.000 description 1
- 229910052740 iodine Inorganic materials 0.000 description 1
- 238000006386 neutralization reaction Methods 0.000 description 1
- 231100000252 nontoxic Toxicity 0.000 description 1
- 230000003000 nontoxic effect Effects 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- OXNIZHLAWKMVMX-UHFFFAOYSA-N picric acid Chemical compound OC1=C([N+]([O-])=O)C=C([N+]([O-])=O)C=C1[N+]([O-])=O OXNIZHLAWKMVMX-UHFFFAOYSA-N 0.000 description 1
- 239000002574 poison Substances 0.000 description 1
- 230000007096 poisonous effect Effects 0.000 description 1
- 229910052700 potassium Inorganic materials 0.000 description 1
- 239000011591 potassium Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 239000011435 rock Substances 0.000 description 1
- 229910052708 sodium Inorganic materials 0.000 description 1
- 239000011734 sodium Substances 0.000 description 1
- 239000011780 sodium chloride Substances 0.000 description 1
- 238000004448 titration Methods 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 238000003911 water pollution Methods 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C23—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; CHEMICAL SURFACE TREATMENT; DIFFUSION TREATMENT OF METALLIC MATERIAL; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL; INHIBITING CORROSION OF METALLIC MATERIAL OR INCRUSTATION IN GENERAL
- C23C—COATING METALLIC MATERIAL; COATING MATERIAL WITH METALLIC MATERIAL; SURFACE TREATMENT OF METALLIC MATERIAL BY DIFFUSION INTO THE SURFACE, BY CHEMICAL CONVERSION OR SUBSTITUTION; COATING BY VACUUM EVAPORATION, BY SPUTTERING, BY ION IMPLANTATION OR BY CHEMICAL VAPOUR DEPOSITION, IN GENERAL
- C23C22/00—Chemical surface treatment of metallic material by reaction of the surface with a reactive liquid, leaving reaction products of surface material in the coating, e.g. conversion coatings, passivation of metals
- C23C22/82—After-treatment
- C23C22/83—Chemical after-treatment
Landscapes
- Chemical & Material Sciences (AREA)
- General Chemical & Material Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Mechanical Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Chemical Treatment Of Metals (AREA)
- Polymers With Sulfur, Phosphorus Or Metals In The Main Chain (AREA)
- Treatments Of Macromolecular Shaped Articles (AREA)
- Application Of Or Painting With Fluid Materials (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US00308072A US3852123A (en) | 1972-11-20 | 1972-11-20 | Sealing rinses for phosphate coatings on metal |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| DE2325974A1 true DE2325974A1 (de) | 1974-05-22 |
Family
ID=23192426
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| DE2325974A Pending DE2325974A1 (de) | 1972-11-20 | 1973-05-22 | Verfahren zum schliessen der poren von phosphatierten metallen |
Country Status (11)
| Country | Link |
|---|---|
| US (1) | US3852123A (OSRAM) |
| JP (1) | JPS4981238A (OSRAM) |
| AR (1) | AR195013A1 (OSRAM) |
| BE (1) | BE800875A (OSRAM) |
| BR (1) | BR7304844D0 (OSRAM) |
| DE (1) | DE2325974A1 (OSRAM) |
| FR (1) | FR2207199B3 (OSRAM) |
| GB (1) | GB1381084A (OSRAM) |
| IT (1) | IT985486B (OSRAM) |
| NL (1) | NL7310324A (OSRAM) |
| ZA (1) | ZA733697B (OSRAM) |
Families Citing this family (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE3400339A1 (de) * | 1984-01-07 | 1985-08-29 | Gerhard Collardin GmbH, 5000 Köln | Verfahren zur nachpassivierung von phosphatierten metalloberflaechen unter verwendung von nickel- und/oder kupfer-kationen enthaltenden loesungen |
| DE3924984A1 (de) * | 1989-07-28 | 1991-01-31 | Metallgesellschaft Ag | Verfahren zur passivierenden nachspuelung von phosphatschichten |
| DE4017186A1 (de) * | 1990-05-29 | 1991-12-05 | Metallgesellschaft Ag | Erzeugung von konversionsueberzuegen auf zink- oder zinklegierungsoberflaechen |
| US5294266A (en) * | 1989-07-28 | 1994-03-15 | Metallgesellschaft Aktiengesellschaft | Process for a passivating postrinsing of conversion layers |
| US5128211A (en) * | 1991-02-28 | 1992-07-07 | Diversey Corporation | Aluminum based phosphate final rinse |
| US5433773A (en) * | 1994-06-02 | 1995-07-18 | Fremont Industries, Inc. | Method and composition for treatment of phosphate coated metal surfaces |
| US5993558A (en) * | 1996-07-17 | 1999-11-30 | Texaco Inc. | Removal of fluoride-containing scales using aluminum salt solution |
| DE10332008B4 (de) * | 2003-07-14 | 2006-08-10 | Infineon Technologies Ag | Elektrische Schaltung sowie Verfahren zum Testen von elektronischen Bauteilen |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2737498A (en) * | 1946-07-12 | 1956-03-06 | Produits Chim Terres Rares Soc | Product for and process of treating metallic articles before coating |
| US3116178A (en) * | 1961-05-29 | 1963-12-31 | Lubrizol Corp | Phosphating solutions |
| US3365377A (en) * | 1964-02-06 | 1968-01-23 | Olin Mathieson | Method of sealing anodized aluminum |
| US3664887A (en) * | 1969-04-14 | 1972-05-23 | Pennwalt Corp | Process for increasing corrosion resistance of conversion coated metal |
-
1972
- 1972-11-20 US US00308072A patent/US3852123A/en not_active Expired - Lifetime
-
1973
- 1973-05-22 DE DE2325974A patent/DE2325974A1/de active Pending
- 1973-05-24 FR FR7318892A patent/FR2207199B3/fr not_active Expired
- 1973-05-30 ZA ZA733697A patent/ZA733697B/xx unknown
- 1973-06-13 BE BE132238A patent/BE800875A/xx unknown
- 1973-06-14 AR AR248581A patent/AR195013A1/es active
- 1973-06-18 IT IT50855/73A patent/IT985486B/it active
- 1973-06-29 BR BR4844/73A patent/BR7304844D0/pt unknown
- 1973-07-25 NL NL7310324A patent/NL7310324A/xx unknown
- 1973-08-10 GB GB3807673A patent/GB1381084A/en not_active Expired
- 1973-09-28 JP JP48108596A patent/JPS4981238A/ja active Pending
Also Published As
| Publication number | Publication date |
|---|---|
| NL7310324A (OSRAM) | 1974-05-22 |
| FR2207199A1 (OSRAM) | 1974-06-14 |
| BR7304844D0 (pt) | 1974-10-15 |
| FR2207199B3 (OSRAM) | 1976-05-14 |
| ZA733697B (en) | 1974-04-24 |
| JPS4981238A (OSRAM) | 1974-08-06 |
| BE800875A (fr) | 1973-10-01 |
| IT985486B (it) | 1974-11-30 |
| GB1381084A (en) | 1975-01-22 |
| US3852123A (en) | 1974-12-03 |
| AR195013A1 (es) | 1973-08-30 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| OHJ | Non-payment of the annual fee |