CS249110B2 - Method of water non-miscible substance encapsulation - Google Patents
Method of water non-miscible substance encapsulation Download PDFInfo
- Publication number
- CS249110B2 CS249110B2 CS802072A CS207280A CS249110B2 CS 249110 B2 CS249110 B2 CS 249110B2 CS 802072 A CS802072 A CS 802072A CS 207280 A CS207280 A CS 207280A CS 249110 B2 CS249110 B2 CS 249110B2
- Authority
- CS
- Czechoslovakia
- Prior art keywords
- water
- immiscible
- encapsulated
- microcapsules
- reax
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 65
- 239000000126 substance Substances 0.000 title claims description 33
- 238000005538 encapsulation Methods 0.000 title abstract description 15
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title description 54
- 239000000463 material Substances 0.000 claims abstract description 44
- 230000008569 process Effects 0.000 claims abstract description 38
- 229920000538 Poly[(phenyl isocyanate)-co-formaldehyde] Polymers 0.000 claims abstract description 34
- 150000001412 amines Chemical class 0.000 claims abstract description 33
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- 239000007787 solid Substances 0.000 claims abstract description 7
- NAQMVNRVTILPCV-UHFFFAOYSA-N hexane-1,6-diamine Chemical compound NCCCCCCN NAQMVNRVTILPCV-UHFFFAOYSA-N 0.000 claims description 95
- 239000003094 microcapsule Substances 0.000 claims description 56
- 229920005610 lignin Polymers 0.000 claims description 19
- JXLHNMVSKXFWAO-UHFFFAOYSA-N azane;7-fluoro-2,1,3-benzoxadiazole-4-sulfonic acid Chemical compound N.OS(=O)(=O)C1=CC=C(F)C2=NON=C12 JXLHNMVSKXFWAO-UHFFFAOYSA-N 0.000 claims description 18
- 238000003756 stirring Methods 0.000 claims description 18
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- 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 claims description 12
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- MRNZSTMRDWRNNR-UHFFFAOYSA-N bis(hexamethylene)triamine Chemical compound NCCCCCCNCCCCCCN MRNZSTMRDWRNNR-UHFFFAOYSA-N 0.000 claims description 6
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- FYYHWMGAXLPEAU-UHFFFAOYSA-N Magnesium Chemical compound [Mg] FYYHWMGAXLPEAU-UHFFFAOYSA-N 0.000 claims description 5
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- 230000002028 premature Effects 0.000 description 1
- 125000002924 primary amino group Chemical group [H]N([H])* 0.000 description 1
- 230000002035 prolonged effect Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 125000001436 propyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])[H] 0.000 description 1
- AOHJOMMDDJHIJH-UHFFFAOYSA-N propylenediamine Chemical compound CC(N)CN AOHJOMMDDJHIJH-UHFFFAOYSA-N 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- HYJYGLGUBUDSLJ-UHFFFAOYSA-N pyrethrin Natural products CCC(=O)OC1CC(=C)C2CC3OC3(C)C2C2OC(=O)C(=C)C12 HYJYGLGUBUDSLJ-UHFFFAOYSA-N 0.000 description 1
- VJFUPGQZSXIULQ-XIGJTORUSA-N pyrethrin II Chemical compound CC1(C)[C@H](/C=C(\C)C(=O)OC)[C@H]1C(=O)O[C@@H]1C(C)=C(C\C=C/C=C)C(=O)C1 VJFUPGQZSXIULQ-XIGJTORUSA-N 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- ODCWYMIRDDJXKW-UHFFFAOYSA-N simazine Chemical compound CCNC1=NC(Cl)=NC(NCC)=N1 ODCWYMIRDDJXKW-UHFFFAOYSA-N 0.000 description 1
- 238000005245 sintering Methods 0.000 description 1
- 229910000030 sodium bicarbonate Inorganic materials 0.000 description 1
- 235000017557 sodium bicarbonate Nutrition 0.000 description 1
- 229910000029 sodium carbonate Inorganic materials 0.000 description 1
- 239000012798 spherical particle Substances 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 230000002459 sustained effect Effects 0.000 description 1
- 229920005992 thermoplastic resin Polymers 0.000 description 1
- 239000002562 thickening agent Substances 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J13/00—Colloid chemistry, e.g. the production of colloidal materials or their solutions, not otherwise provided for; Making microcapsules or microballoons
- B01J13/02—Making microcapsules or microballoons
- B01J13/06—Making microcapsules or microballoons by phase separation
- B01J13/14—Polymerisation; cross-linking
- B01J13/16—Interfacial polymerisation
-
- A—HUMAN NECESSITIES
- A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
- A01N—PRESERVATION OF BODIES OF HUMANS OR ANIMALS OR PLANTS OR PARTS THEREOF; BIOCIDES, e.g. AS DISINFECTANTS, AS PESTICIDES OR AS HERBICIDES; PEST REPELLANTS OR ATTRACTANTS; PLANT GROWTH REGULATORS
- A01N25/00—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests
- A01N25/26—Biocides, pest repellants or attractants, or plant growth regulators, characterised by their forms, or by their non-active ingredients or by their methods of application, e.g. seed treatment or sequential application; Substances for reducing the noxious effect of the active ingredients to organisms other than pests in coated particulate form
- A01N25/28—Microcapsules or nanocapsules
-
- 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
- Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
- Y10T—TECHNICAL SUBJECTS COVERED BY FORMER US CLASSIFICATION
- Y10T428/00—Stock material or miscellaneous articles
- Y10T428/29—Coated or structually defined flake, particle, cell, strand, strand portion, rod, filament, macroscopic fiber or mass thereof
- Y10T428/2982—Particulate matter [e.g., sphere, flake, etc.]
- Y10T428/2984—Microcapsule with fluid core [includes liposome]
Landscapes
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Health & Medical Sciences (AREA)
- Organic Chemistry (AREA)
- Pest Control & Pesticides (AREA)
- Dentistry (AREA)
- Environmental Sciences (AREA)
- Zoology (AREA)
- Plant Pathology (AREA)
- Toxicology (AREA)
- Engineering & Computer Science (AREA)
- Agronomy & Crop Science (AREA)
- Wood Science & Technology (AREA)
- Dispersion Chemistry (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Agricultural Chemicals And Associated Chemicals (AREA)
- Manufacturing Of Micro-Capsules (AREA)
- Building Environments (AREA)
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US06/023,566 US4280833A (en) | 1979-03-26 | 1979-03-26 | Encapsulation by interfacial polycondensation, and aqueous herbicidal composition containing microcapsules produced thereby |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CS249110B2 true CS249110B2 (en) | 1987-03-12 |
Family
ID=21815892
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CS802072A CS249110B2 (en) | 1979-03-26 | 1980-03-25 | Method of water non-miscible substance encapsulation |
Country Status (30)
| Country | Link |
|---|---|
| US (2) | US4280833A (fr) |
| EP (1) | EP0017409B1 (fr) |
| JP (1) | JPS55129146A (fr) |
| KR (1) | KR840000114B1 (fr) |
| AR (1) | AR224644A1 (fr) |
| AT (1) | ATE2774T1 (fr) |
| AU (1) | AU532474B2 (fr) |
| BR (1) | BR8001786A (fr) |
| CA (1) | CA1165581A (fr) |
| CS (1) | CS249110B2 (fr) |
| DD (1) | DD149471A5 (fr) |
| DE (1) | DE3062315D1 (fr) |
| DK (1) | DK155574C (fr) |
| ES (1) | ES8101906A1 (fr) |
| FI (1) | FI67789C (fr) |
| GE (1) | GEP19960529B (fr) |
| GR (1) | GR67254B (fr) |
| HU (1) | HU191324B (fr) |
| IL (1) | IL59510A (fr) |
| IN (1) | IN152084B (fr) |
| NO (1) | NO150424C (fr) |
| NZ (1) | NZ193261A (fr) |
| PH (1) | PH17996A (fr) |
| PL (2) | PL134937B1 (fr) |
| PT (1) | PT71010A (fr) |
| RO (1) | RO81047A (fr) |
| SU (1) | SU1039436A3 (fr) |
| UA (1) | UA5920A1 (fr) |
| YU (1) | YU42504B (fr) |
| ZA (1) | ZA801750B (fr) |
Families Citing this family (108)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4280833A (en) * | 1979-03-26 | 1981-07-28 | Monsanto Company | Encapsulation by interfacial polycondensation, and aqueous herbicidal composition containing microcapsules produced thereby |
| US5160529A (en) * | 1980-10-30 | 1992-11-03 | Imperial Chemical Industries Plc | Microcapsules and microencapsulation process |
| US4439581A (en) * | 1981-09-03 | 1984-03-27 | Kanzaki Paper Manufacturing Co., Ltd. | Method for the production of microcapsules |
| US4599271A (en) * | 1983-06-09 | 1986-07-08 | Moore Business Forms, Inc. | Microencapsulation of polyisocyanates by interchange of multiple |
| US4495509A (en) * | 1983-06-09 | 1985-01-22 | Moore Business Forms, Inc. | Microencapsulation by interchange of multiple emulsions |
| US4563212A (en) * | 1983-12-27 | 1986-01-07 | Monsanto Company | High concentration encapsulation by interfacial polycondensation |
| US4534783A (en) * | 1984-01-03 | 1985-08-13 | Monsanto Co. | High concentration encapsulation of water soluble-materials |
| US4640709A (en) * | 1984-06-12 | 1987-02-03 | Monsanto Company | High concentration encapsulation by interfacial polycondensation |
| US4670246A (en) * | 1984-11-05 | 1987-06-02 | Pennwalt Corporation | Microencapsulated pyrethroids |
| LV5193A3 (lv) * | 1985-09-13 | 1993-10-10 | Ciba Geigy Ag | Panemiens mikrokapsulu udens dispersijas iegusanai |
| ATE77916T1 (de) * | 1985-09-13 | 1992-07-15 | Ciba Geigy Ag | Verfahren zur herstellung von mikrokapseln. |
| GB8603061D0 (en) * | 1986-02-07 | 1986-03-12 | Wellcome Found | Pesticidal formulations |
| US4681806A (en) * | 1986-02-13 | 1987-07-21 | Minnesota Mining And Manufacturing Company | Particles containing releasable fill material and method of making same |
| ZA874985B (en) * | 1986-07-09 | 1988-04-27 | Monsanto Co | Water-dispersible granules and process for the preparation thereof |
| US4936901A (en) | 1986-07-09 | 1990-06-26 | Monsanto Company | Formulations of water-dispersible granules and process for preparation thereof |
| US4849006A (en) * | 1987-08-07 | 1989-07-18 | E.C.C. America Inc. | Controlled release composition and method |
| US4877706A (en) * | 1988-05-25 | 1989-10-31 | Xerox Corporation | Single component cold pressure fixable encapsulated toner compositions |
| JP2632004B2 (ja) * | 1988-06-15 | 1997-07-16 | 富士写真フイルム株式会社 | 感圧記録シート用マイクロカプセルの製造法 |
| NZ231218A (en) * | 1988-11-11 | 1990-12-21 | Sumitomo Chemical Co | Pesticidal composition comprising part of the poorly soluble active agent encapsulated in a water insoluble polymer coating and the remainder emulsified in water |
| US5461027A (en) * | 1989-01-24 | 1995-10-24 | Griffin Corporation | Microencapsulated pendimethalin and method of making and using same |
| US5160530A (en) * | 1989-01-24 | 1992-11-03 | Griffin Corporation | Microencapsulated polymorphic agriculturally active material |
| US5223477A (en) * | 1989-02-03 | 1993-06-29 | Imperial Chemical Industries Plc | Single-package agricultural formulations combining immediate and time-delayed delivery of thiocarbamate herbicides and dichlormid as safener |
| US5049182A (en) * | 1989-02-03 | 1991-09-17 | Ici Americas Inc. | Single-package agricultural formulations combining immediate and time-delayed delivery |
| CA2054054C (fr) * | 1990-10-31 | 2002-11-26 | Richard David Houghton | Composition granulaire dispersable a base de propanil |
| US5714439A (en) * | 1990-10-31 | 1998-02-03 | Rohm And Haas Company | Propanil dispersible granule |
| US5562914A (en) * | 1990-12-06 | 1996-10-08 | Zeneca Inc. | Impregnated porous granules and a polyurethane matrix held within the pores thereof and holding a liquid material for controlled release of liquid material and process therefor |
| US5120349A (en) * | 1990-12-07 | 1992-06-09 | Landec Labs, Inc. | Microcapsule having temperature-dependent permeability profile |
| EP0570382B1 (fr) * | 1991-02-06 | 1999-03-10 | Zeneca Inc. | Composition herbicide microcapsulee |
| US5164126A (en) * | 1991-03-05 | 1992-11-17 | Appleton Papers Inc. | Process for microencapsulation |
| MD24B1 (ro) * | 1991-07-09 | 1994-05-31 | Parfumerii Si Cosmetice Vioric | Compozitie de substante odorante |
| JP2684473B2 (ja) * | 1991-09-02 | 1997-12-03 | 富士写真フイルム株式会社 | マイクロカプセルの連続的製造方法 |
| DK0551796T3 (da) * | 1992-01-03 | 1998-03-23 | Ciba Geigy Ag | Suspension af mikrokapsler og fremgangsmåde til dens fremstiling |
| KR100313589B1 (ko) * | 1993-02-09 | 2002-11-29 | 노바티스 아게 | 미세캡슐의 제조방법 |
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| IL108835A (en) * | 1994-03-03 | 1997-08-14 | Ben Researchiversity Of The Ne | Microencapsulated composition containing chlorpyrifos or endosulfan |
| EP0679333A3 (fr) * | 1994-04-28 | 1996-01-03 | Rohm & Haas | Composition biocide non-sensibilisatrice. |
| US5529772A (en) * | 1994-06-09 | 1996-06-25 | Lignotech, Usa, Inc. | Method for producing improved biological pesticides |
| AU734106B2 (en) * | 1994-11-16 | 2001-06-07 | Fmc Corporation | Low volatility formulations of clomazone |
| EP0792100B1 (fr) * | 1994-11-16 | 2003-01-22 | Fmc Corporation | Formulations de clomazone a faible volatilite |
| US5597780A (en) * | 1994-11-16 | 1997-01-28 | Fmc Corporation | Low volatility formulations of microencapsulated clomazone |
| US5705174A (en) * | 1995-06-07 | 1998-01-06 | American Cyanamid Company | Process for the preparation of microcapsule compositions |
| GB9615158D0 (en) * | 1996-07-19 | 1996-09-04 | Dowelanco | Process for preparing storage-stable pesticide dispersion |
| US6248364B1 (en) | 1997-04-07 | 2001-06-19 | 3M Innovative Properties Company | Encapsulation process and encapsulated products |
| US6080418A (en) * | 1997-04-07 | 2000-06-27 | 3M Innovative Properties Company | Suspensions of microcapsules containing biologically active ingredients and adhesive microspheres |
| US5972363A (en) * | 1997-04-11 | 1999-10-26 | Rohm And Haas Company | Use of an encapsulated bioactive composition |
| US5925595A (en) * | 1997-09-05 | 1999-07-20 | Monsanto Company | Microcapsules with readily adjustable release rates |
| JP4874452B2 (ja) * | 1998-03-05 | 2012-02-15 | 住友化学株式会社 | 固体物質のマイクロカプセル化方法およびマイクロカプセル組成物 |
| DK1104991T3 (da) * | 1998-08-18 | 2003-07-07 | Fmc Corp | Kombinationer af to eller flere aktive ingredienser, hvori der benyttes mikroindkapslede formulationer |
| BR0109329A (pt) * | 2000-03-17 | 2002-12-24 | Bayer Ag | Suspensões de microcápsulas |
| DE10022989A1 (de) * | 2000-05-11 | 2001-11-22 | Aventis Cropscience Gmbh | Kombinationen von Pflanzenschutzmitteln mit organischen oder anorganischen Trägermaterialien |
| US6992047B2 (en) * | 2001-04-11 | 2006-01-31 | Monsanto Technology Llc | Method of microencapsulating an agricultural active having a high melting point and uses for such materials |
| IL148693A0 (en) * | 2002-03-14 | 2002-09-12 | Agrichem Ltd | Encapsulated nematocides |
| US20030194418A1 (en) * | 2002-04-12 | 2003-10-16 | Hilton Donald George | Livestock treatment capsule and method for applying a livestock treatment capsule |
| US6828025B2 (en) * | 2002-05-24 | 2004-12-07 | Mcmaster University | Microencapsulation of polar liquids in copolymer shells |
| US20040137031A1 (en) * | 2002-12-13 | 2004-07-15 | Monsanto Technology Llc | Microcapsules with amine adjusted release rates |
| JP2007528285A (ja) * | 2003-05-11 | 2007-10-11 | ベン グリオン ユニバーシティ オブ ザ ネゲブ リサーチ アンド ディベロップメント オーソリティ | 封入された精油 |
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| WO2005122758A1 (fr) * | 2004-06-14 | 2005-12-29 | Monsanto Technology Llc | Microcapsules dans lesquelles un materiau noyau est libere activement |
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| US20060240987A1 (en) * | 2005-04-26 | 2006-10-26 | Gowan Company, L.L.C. | Novel agrochemical sulfonamide formulations |
| DE102006001941A1 (de) * | 2006-01-14 | 2007-07-19 | Bayer Technology Services Gmbh | Schichtsilicatformulierung für eine kontrollierte Wirkstofffreisetzung |
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| US3576760A (en) * | 1969-06-13 | 1971-04-27 | Nat Patent Dev Corp | Water soluble entrapping |
| US3663200A (en) * | 1969-09-26 | 1972-05-16 | Monsanto Co | Grass selective herbicide composition |
| ES390653A1 (es) * | 1970-04-28 | 1974-03-16 | Fuji Photo Film Co Ltd | Procedimiento para la produccion de microcapsulas conte- niendo liquido aceitoso. |
| US3959464A (en) * | 1971-06-03 | 1976-05-25 | Pennwalt Corporation | Microencapsulated methyl and ethyl parathion insecticide in aqueous carrier |
| JPS4832778A (fr) * | 1971-08-31 | 1973-05-02 | ||
| CA1104882A (fr) * | 1972-03-15 | 1981-07-14 | Herbert B. Scher | Methode de mise en capsule |
| US3929453A (en) * | 1973-09-27 | 1975-12-30 | Westvaco Corp | Composites of lignin and biologically active materials |
| US4155741A (en) * | 1974-05-01 | 1979-05-22 | Stauffer Chemical Company | Stable suspension system for microencapsulated flowable formulations, and method of preparing stable suspension of microcapsules |
| CA1044134A (fr) * | 1975-04-09 | 1978-12-12 | Minnesota Mining And Manufacturing Company | Insecticide sous microcapsule |
| US4046741A (en) * | 1976-02-17 | 1977-09-06 | Stauffer Chemical Company | Post-treatment of polyurea microcapsules |
| DK253779A (da) * | 1978-08-03 | 1980-02-04 | Du Pont | Insecticidt middel og fremgangsmaade til fremstilling deraf |
| US4280833A (en) * | 1979-03-26 | 1981-07-28 | Monsanto Company | Encapsulation by interfacial polycondensation, and aqueous herbicidal composition containing microcapsules produced thereby |
-
1979
- 1979-03-26 US US06/023,566 patent/US4280833A/en not_active Expired - Lifetime
-
1980
- 1980-02-29 IL IL59510A patent/IL59510A/xx unknown
- 1980-03-22 GR GR61510A patent/GR67254B/el unknown
- 1980-03-24 EP EP80300903A patent/EP0017409B1/fr not_active Expired
- 1980-03-24 DE DE8080300903T patent/DE3062315D1/de not_active Expired
- 1980-03-24 AT AT80300903T patent/ATE2774T1/de active
- 1980-03-24 ES ES489855A patent/ES8101906A1/es not_active Expired
- 1980-03-25 PH PH23807A patent/PH17996A/en unknown
- 1980-03-25 AR AR280427A patent/AR224644A1/es active
- 1980-03-25 PL PL1980238269A patent/PL134937B1/pl unknown
- 1980-03-25 IN IN344/CAL/80A patent/IN152084B/en unknown
- 1980-03-25 JP JP3814880A patent/JPS55129146A/ja active Granted
- 1980-03-25 BR BR8001786A patent/BR8001786A/pt not_active IP Right Cessation
- 1980-03-25 CA CA000348392A patent/CA1165581A/fr not_active Expired
- 1980-03-25 ZA ZA00801750A patent/ZA801750B/xx unknown
- 1980-03-25 PT PT71010A patent/PT71010A/pt not_active IP Right Cessation
- 1980-03-25 UA UA2896355A patent/UA5920A1/uk unknown
- 1980-03-25 DK DK127780A patent/DK155574C/da not_active IP Right Cessation
- 1980-03-25 RO RO80100616A patent/RO81047A/fr unknown
- 1980-03-25 DD DD80219908A patent/DD149471A5/de not_active IP Right Cessation
- 1980-03-25 KR KR1019800001230A patent/KR840000114B1/ko not_active Expired
- 1980-03-25 PL PL1980222988A patent/PL134710B1/pl unknown
- 1980-03-25 NO NO800856A patent/NO150424C/no unknown
- 1980-03-25 HU HU80696A patent/HU191324B/hu unknown
- 1980-03-25 NZ NZ193261A patent/NZ193261A/xx unknown
- 1980-03-25 FI FI800920A patent/FI67789C/fi not_active IP Right Cessation
- 1980-03-25 SU SU802896355A patent/SU1039436A3/ru active
- 1980-03-25 YU YU831/80A patent/YU42504B/xx unknown
- 1980-03-25 CS CS802072A patent/CS249110B2/cs unknown
- 1980-03-25 AU AU56828/80A patent/AU532474B2/en not_active Ceased
-
1981
- 1981-07-22 US US06/286,092 patent/US4417916A/en not_active Expired - Lifetime
-
1993
- 1993-07-31 GE GEAP19931354A patent/GEP19960529B/en unknown
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