FR2464921A1 - Procede de traitement d'un phosphate aluminocalcique - Google Patents
Procede de traitement d'un phosphate aluminocalcique Download PDFInfo
- Publication number
- FR2464921A1 FR2464921A1 FR7922393A FR7922393A FR2464921A1 FR 2464921 A1 FR2464921 A1 FR 2464921A1 FR 7922393 A FR7922393 A FR 7922393A FR 7922393 A FR7922393 A FR 7922393A FR 2464921 A1 FR2464921 A1 FR 2464921A1
- Authority
- FR
- France
- Prior art keywords
- aluminum
- water
- recovery
- process according
- phosphate
- 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.)
- Granted
Links
- 238000000034 method Methods 0.000 title claims abstract description 32
- 229910019142 PO4 Inorganic materials 0.000 title abstract description 17
- NBIIXXVUZAFLBC-UHFFFAOYSA-K phosphate Chemical compound [O-]P([O-])([O-])=O NBIIXXVUZAFLBC-UHFFFAOYSA-K 0.000 title abstract description 17
- 239000010452 phosphate Substances 0.000 title abstract description 16
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims abstract description 74
- 229910052782 aluminium Inorganic materials 0.000 claims abstract description 28
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 claims abstract description 25
- 239000001506 calcium phosphate Substances 0.000 claims abstract description 16
- QORWJWZARLRLPR-UHFFFAOYSA-H tricalcium bis(phosphate) Chemical compound [Ca+2].[Ca+2].[Ca+2].[O-]P([O-])([O-])=O.[O-]P([O-])([O-])=O QORWJWZARLRLPR-UHFFFAOYSA-H 0.000 claims abstract description 15
- 238000011282 treatment Methods 0.000 claims abstract description 13
- 239000011575 calcium Substances 0.000 claims abstract description 10
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000002253 acid Substances 0.000 claims abstract description 9
- 229910052791 calcium Inorganic materials 0.000 claims abstract description 9
- 229910000391 tricalcium phosphate Inorganic materials 0.000 claims abstract 4
- 229940078499 tricalcium phosphate Drugs 0.000 claims abstract 4
- 235000019731 tricalcium phosphate Nutrition 0.000 claims abstract 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 52
- NBIIXXVUZAFLBC-UHFFFAOYSA-N Phosphoric acid Chemical compound OP(O)(O)=O NBIIXXVUZAFLBC-UHFFFAOYSA-N 0.000 claims description 50
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 48
- 238000011084 recovery Methods 0.000 claims description 39
- 229910000147 aluminium phosphate Inorganic materials 0.000 claims description 25
- 238000001354 calcination Methods 0.000 claims description 24
- 229910052742 iron Inorganic materials 0.000 claims description 22
- 239000011435 rock Substances 0.000 claims description 20
- 239000000243 solution Substances 0.000 claims description 20
- 238000006243 chemical reaction Methods 0.000 claims description 17
- ZMPZURBYCNDNBN-UHFFFAOYSA-K aluminum;calcium;phosphate Chemical compound [Al+3].[Ca+2].[O-]P([O-])([O-])=O ZMPZURBYCNDNBN-UHFFFAOYSA-K 0.000 claims description 15
- 239000007864 aqueous solution Substances 0.000 claims description 13
- 238000005406 washing Methods 0.000 claims description 12
- 239000002367 phosphate rock Substances 0.000 claims description 10
- 238000001914 filtration Methods 0.000 claims description 8
- 239000007787 solid Substances 0.000 claims description 7
- 239000000725 suspension Substances 0.000 claims description 5
- 239000008346 aqueous phase Substances 0.000 claims description 4
- 150000001768 cations Chemical class 0.000 claims description 4
- 239000010440 gypsum Substances 0.000 claims description 4
- 229910052602 gypsum Inorganic materials 0.000 claims description 4
- BAUYGSIQEAFULO-UHFFFAOYSA-L iron(2+) sulfate (anhydrous) Chemical compound [Fe+2].[O-]S([O-])(=O)=O BAUYGSIQEAFULO-UHFFFAOYSA-L 0.000 claims description 4
- 239000005569 Iron sulphate Substances 0.000 claims description 3
- BUACSMWVFUNQET-UHFFFAOYSA-H dialuminum;trisulfate;hydrate Chemical compound O.[Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O BUACSMWVFUNQET-UHFFFAOYSA-H 0.000 claims description 3
- 238000005530 etching Methods 0.000 claims description 3
- -1 iron ions Chemical class 0.000 claims description 2
- 239000000047 product Substances 0.000 claims description 2
- 238000000926 separation method Methods 0.000 claims 3
- 239000007795 chemical reaction product Substances 0.000 claims 1
- 229910000389 calcium phosphate Inorganic materials 0.000 abstract description 11
- XLYOFNOQVPJJNP-PWCQTSIFSA-N Tritiated water Chemical compound [3H]O[3H] XLYOFNOQVPJJNP-PWCQTSIFSA-N 0.000 abstract 1
- 150000007513 acids Chemical class 0.000 abstract 1
- DLYUQMMRRRQYAE-UHFFFAOYSA-N phosphorus pentoxide Inorganic materials O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 description 35
- 235000021317 phosphate Nutrition 0.000 description 15
- 238000005063 solubilization Methods 0.000 description 12
- 230000007928 solubilization Effects 0.000 description 12
- 235000011010 calcium phosphates Nutrition 0.000 description 11
- 239000000203 mixture Substances 0.000 description 11
- 229910052698 phosphorus Inorganic materials 0.000 description 10
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 9
- 239000011574 phosphorus Substances 0.000 description 9
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 8
- 230000007423 decrease Effects 0.000 description 8
- 229910052751 metal Inorganic materials 0.000 description 7
- 239000002184 metal Substances 0.000 description 7
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 7
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 6
- 150000002739 metals Chemical class 0.000 description 6
- 239000000706 filtrate Substances 0.000 description 5
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 5
- 239000001175 calcium sulphate Substances 0.000 description 4
- 235000011132 calcium sulphate Nutrition 0.000 description 4
- 238000004519 manufacturing process Methods 0.000 description 4
- 239000012071 phase Substances 0.000 description 4
- 239000003513 alkali Substances 0.000 description 3
- 238000002156 mixing Methods 0.000 description 3
- 230000007935 neutral effect Effects 0.000 description 3
- 239000002245 particle Substances 0.000 description 3
- 150000003839 salts Chemical class 0.000 description 3
- 229920000388 Polyphosphate Polymers 0.000 description 2
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 2
- 229910052770 Uranium Inorganic materials 0.000 description 2
- 230000002378 acidificating effect Effects 0.000 description 2
- 229910052784 alkaline earth metal Inorganic materials 0.000 description 2
- ILRRQNADMUWWFW-UHFFFAOYSA-K aluminium phosphate Chemical compound O1[Al]2OP1(=O)O2 ILRRQNADMUWWFW-UHFFFAOYSA-K 0.000 description 2
- DIZPMCHEQGEION-UHFFFAOYSA-H aluminium sulfate (anhydrous) Chemical class [Al+3].[Al+3].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O DIZPMCHEQGEION-UHFFFAOYSA-H 0.000 description 2
- RGKMZNDDOBAZGW-UHFFFAOYSA-N aluminum calcium Chemical compound [Al].[Ca] RGKMZNDDOBAZGW-UHFFFAOYSA-N 0.000 description 2
- BFNBIHQBYMNNAN-UHFFFAOYSA-N ammonium sulfate Chemical compound N.N.OS(O)(=O)=O BFNBIHQBYMNNAN-UHFFFAOYSA-N 0.000 description 2
- 229910052921 ammonium sulfate Inorganic materials 0.000 description 2
- 239000001166 ammonium sulphate Substances 0.000 description 2
- 235000011130 ammonium sulphate Nutrition 0.000 description 2
- 229910052593 corundum Inorganic materials 0.000 description 2
- 238000004090 dissolution Methods 0.000 description 2
- 239000012065 filter cake Substances 0.000 description 2
- 238000005360 mashing Methods 0.000 description 2
- 239000001205 polyphosphate Substances 0.000 description 2
- 235000011176 polyphosphates Nutrition 0.000 description 2
- 239000011541 reaction mixture Substances 0.000 description 2
- 230000035484 reaction time Effects 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 229910021653 sulphate ion Inorganic materials 0.000 description 2
- 235000011149 sulphuric acid Nutrition 0.000 description 2
- DNYWZCXLKNTFFI-UHFFFAOYSA-N uranium Chemical compound [U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U][U] DNYWZCXLKNTFFI-UHFFFAOYSA-N 0.000 description 2
- 229910001845 yogo sapphire Inorganic materials 0.000 description 2
- YPFNIPKMNMDDDB-UHFFFAOYSA-K 2-[2-[bis(carboxylatomethyl)amino]ethyl-(2-hydroxyethyl)amino]acetate;iron(3+) Chemical compound [Fe+3].OCCN(CC([O-])=O)CCN(CC([O-])=O)CC([O-])=O YPFNIPKMNMDDDB-UHFFFAOYSA-K 0.000 description 1
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 206010012289 Dementia Diseases 0.000 description 1
- 150000001342 alkaline earth metals Chemical class 0.000 description 1
- 229940037003 alum Drugs 0.000 description 1
- 150000004645 aluminates Chemical class 0.000 description 1
- 239000006227 byproduct Substances 0.000 description 1
- 230000002308 calcification Effects 0.000 description 1
- YVYBXNMACUPYES-UHFFFAOYSA-L calcium carboxylatooxycarbonyl carbonate Chemical compound [Ca+2].[O-]C(=O)OC(=O)OC([O-])=O YVYBXNMACUPYES-UHFFFAOYSA-L 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000006115 defluorination reaction Methods 0.000 description 1
- 230000018044 dehydration Effects 0.000 description 1
- 238000006297 dehydration reaction Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010790 dilution Methods 0.000 description 1
- 239000012895 dilution Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000001704 evaporation Methods 0.000 description 1
- 230000008020 evaporation Effects 0.000 description 1
- 238000000605 extraction Methods 0.000 description 1
- 239000003337 fertilizer Substances 0.000 description 1
- 238000000227 grinding Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 150000002500 ions Chemical class 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 description 1
- OJMIONKXNSYLSR-UHFFFAOYSA-N phosphorous acid Chemical compound OP(O)O OJMIONKXNSYLSR-UHFFFAOYSA-N 0.000 description 1
- 239000002244 precipitate Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 238000004064 recycling Methods 0.000 description 1
- 230000003381 solubilizing effect Effects 0.000 description 1
- 239000002904 solvent Substances 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 230000004580 weight loss Effects 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/223—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen only one form of calcium sulfate being formed
- C01B25/225—Dihydrate process
-
- C—CHEMISTRY; METALLURGY
- C01—INORGANIC CHEMISTRY
- C01B—NON-METALLIC ELEMENTS; COMPOUNDS THEREOF; METALLOIDS OR COMPOUNDS THEREOF NOT COVERED BY SUBCLASS C01C
- C01B25/00—Phosphorus; Compounds thereof
- C01B25/16—Oxyacids of phosphorus; Salts thereof
- C01B25/18—Phosphoric acid
- C01B25/22—Preparation by reacting phosphate-containing material with an acid, e.g. wet process
- C01B25/222—Preparation by reacting phosphate-containing material with an acid, e.g. wet process with sulfuric acid, a mixture of acids mainly consisting of sulfuric acid or a mixture of compounds forming it in situ, e.g. a mixture of sulfur dioxide, water and oxygen
- C01B25/232—Preparation by reacting phosphate containing material with concentrated sulfuric acid and subsequently lixiviating the obtained mass, e.g. clinker process
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Inorganic Chemistry (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
- Inorganic Compounds Of Heavy Metals (AREA)
Priority Applications (8)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7922393A FR2464921A1 (fr) | 1979-09-07 | 1979-09-07 | Procede de traitement d'un phosphate aluminocalcique |
| US06/175,583 US4321244A (en) | 1979-09-07 | 1980-08-05 | Process for the treatment of a calcium aluminophosphate |
| JP55121824A JPS6016369B2 (ja) | 1979-09-07 | 1980-09-04 | アルミノ燐酸カルシウムの処理法 |
| AU62066/80A AU534312B2 (en) | 1979-09-07 | 1980-09-05 | Treatment of calcium aluminium phosphates |
| BR8005684A BR8005684A (pt) | 1979-09-07 | 1980-09-05 | Processo para tratamento de uma rocha fosfatada e aplicacao do processo |
| GB8028809A GB2057414B (en) | 1979-09-07 | 1980-09-05 | Treatment of calcium aluminium phosphates |
| OA57208A OA06701A (fr) | 1979-09-07 | 1980-09-06 | Procédé de traitement d'un phosphate aluminocalcique. |
| SG113/84A SG11384G (en) | 1979-09-07 | 1984-02-08 | Treatment of calcium aluminium phosphates |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7922393A FR2464921A1 (fr) | 1979-09-07 | 1979-09-07 | Procede de traitement d'un phosphate aluminocalcique |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| FR2464921A1 true FR2464921A1 (fr) | 1981-03-20 |
| FR2464921B1 FR2464921B1 (enExample) | 1981-09-11 |
Family
ID=9229447
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7922393A Granted FR2464921A1 (fr) | 1979-09-07 | 1979-09-07 | Procede de traitement d'un phosphate aluminocalcique |
Country Status (8)
| Country | Link |
|---|---|
| US (1) | US4321244A (enExample) |
| JP (1) | JPS6016369B2 (enExample) |
| AU (1) | AU534312B2 (enExample) |
| BR (1) | BR8005684A (enExample) |
| FR (1) | FR2464921A1 (enExample) |
| GB (1) | GB2057414B (enExample) |
| OA (1) | OA06701A (enExample) |
| SG (1) | SG11384G (enExample) |
Families Citing this family (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| AU571549B2 (en) * | 1983-08-04 | 1988-04-21 | Thomas, G. | Extracting soluble phosphates |
| US7763359B2 (en) * | 2004-08-30 | 2010-07-27 | Bunge Fertilizantes S.A. | Aluminum phosphate, polyphosphate and metaphosphate particles and their use as pigments in paints and method of making same |
| BRPI0403713B1 (pt) * | 2004-08-30 | 2021-01-12 | Universidade Estadual De Campinas - Unicamp | processo de fabricação de um pigmento branco baseado na síntese de partículas ocas de ortofosfato ou polifosfato de alumínio |
| KR101440163B1 (ko) | 2006-08-11 | 2014-09-16 | 번지 페르틸리잔테스 에씨.아. | 알루미늄 포스페이트 또는 폴리포스페이트 입자의 제조 |
| US9023145B2 (en) * | 2008-02-12 | 2015-05-05 | Bunge Amorphic Solutions Llc | Aluminum phosphate or polyphosphate compositions |
| AR075381A1 (es) * | 2009-02-10 | 2011-03-30 | Unicamp | Uso de particulas de fosfato, polifosfato y metafosfato, de aluminio en aplicaciones de recubrimiento de papeles. |
| US9005355B2 (en) | 2010-10-15 | 2015-04-14 | Bunge Amorphic Solutions Llc | Coating compositions with anticorrosion properties |
| US9371454B2 (en) | 2010-10-15 | 2016-06-21 | Bunge Amorphic Solutions Llc | Coating compositions with anticorrosion properties |
| US9078445B2 (en) | 2012-04-16 | 2015-07-14 | Bunge Amorphic Solutions Llc | Antimicrobial chemical compositions |
| US9611147B2 (en) | 2012-04-16 | 2017-04-04 | Bunge Amorphic Solutions Llc | Aluminum phosphates, compositions comprising aluminum phosphate, and methods for making the same |
| US9155311B2 (en) | 2013-03-15 | 2015-10-13 | Bunge Amorphic Solutions Llc | Antimicrobial chemical compositions |
| CN103274379B (zh) * | 2013-06-13 | 2015-03-04 | 四川商舟实业有限公司 | 煅烧法生产工业磷酸盐的工艺 |
| CN118908748B (zh) * | 2024-07-19 | 2025-10-03 | 山东大学 | 一种用于加固岩石质文物的装置和方法 |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR952504A (fr) * | 1947-07-28 | 1949-11-18 | Davison Chemical Corp | Perfectionnements aux procédés de fabrication d'acide phosphorique |
| US2504544A (en) * | 1947-01-28 | 1950-04-18 | Davison Chemical Corp | Process of manufacturing phosphoric acid |
Family Cites Families (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB636964A (en) | 1947-01-28 | 1950-05-10 | Davison Chemical Corp | Improved process for the manufacture of phosphoric acid |
| GB733880A (en) | 1952-02-02 | 1955-07-20 | Grace W R & Co | Improvements in or relating to the manufacture of phosphoric acid |
| NL277211A (enExample) * | 1961-04-20 | |||
| US3161467A (en) * | 1962-04-17 | 1964-12-15 | Tennessee Valley Authority | Direct method for the production of high-analysis phosphoric acid |
| GB1128104A (en) | 1965-05-25 | 1968-09-25 | Chem & Phosphates Ltd | A process for the production of concentrated phosphoric acid |
| US3420628A (en) * | 1966-04-25 | 1969-01-07 | Brown & Ass James G | Process for the manufacture of concentrated phosphoric acids |
| SE328266B (enExample) | 1967-05-17 | 1970-09-14 | Mizusawa Industrial Chem | |
| GB1370534A (en) | 1972-01-28 | 1974-10-16 | Zotov B G | Method for the production of phosphoric acid |
| JPS5230959B2 (enExample) | 1972-11-25 | 1977-08-11 |
-
1979
- 1979-09-07 FR FR7922393A patent/FR2464921A1/fr active Granted
-
1980
- 1980-08-05 US US06/175,583 patent/US4321244A/en not_active Expired - Lifetime
- 1980-09-04 JP JP55121824A patent/JPS6016369B2/ja not_active Expired
- 1980-09-05 BR BR8005684A patent/BR8005684A/pt unknown
- 1980-09-05 GB GB8028809A patent/GB2057414B/en not_active Expired
- 1980-09-05 AU AU62066/80A patent/AU534312B2/en not_active Ceased
- 1980-09-06 OA OA57208A patent/OA06701A/xx unknown
-
1984
- 1984-02-08 SG SG113/84A patent/SG11384G/en unknown
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US2504544A (en) * | 1947-01-28 | 1950-04-18 | Davison Chemical Corp | Process of manufacturing phosphoric acid |
| FR952504A (fr) * | 1947-07-28 | 1949-11-18 | Davison Chemical Corp | Perfectionnements aux procédés de fabrication d'acide phosphorique |
Non-Patent Citations (2)
| Title |
|---|
| EXBK/57 * |
| EXBK/78 * |
Also Published As
| Publication number | Publication date |
|---|---|
| BR8005684A (pt) | 1981-03-17 |
| GB2057414A (en) | 1981-04-01 |
| US4321244A (en) | 1982-03-23 |
| SG11384G (en) | 1985-01-04 |
| JPS6016369B2 (ja) | 1985-04-25 |
| AU6206680A (en) | 1981-03-12 |
| AU534312B2 (en) | 1984-01-19 |
| JPS5659610A (en) | 1981-05-23 |
| GB2057414B (en) | 1983-08-10 |
| OA06701A (fr) | 1982-05-31 |
| FR2464921B1 (enExample) | 1981-09-11 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |