Patents by Inventor Heinz Frensch
Heinz Frensch has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 4571088Abstract: The invention relates to a process for the preparation of dispersions of plant protection agents, wherein at least one active ingredient being metered, in the molten form, into the outlet stream of a jet, which stream contains a solution of the formulation aids. The process is suitable for all active ingredients which form a stable melt and have a melting point above 70.degree. C. The resulting dispersions have advantageous stabilities.Type: GrantFiled: October 17, 1984Date of Patent: February 18, 1986Assignee: Hoechst AktiengesellschaftInventors: Heinz Frensch, Konrad Albrecht, Gerhard Frisch
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Patent number: 4441919Abstract: Liquid, herbicidal compositions containing Linuron as active substance in the form of emulsifiable concentrates or of aqueous suspension concentrates contain as crystallization inhibiting substance 0.05 to 2% by weight of fat-soluble disazo dyes which prevent the active substance from crystallizing in the aqueous emulsions of the emulsifiable concentrates and in the aqueous suspension concentrates and the aqueous dilutions thereof.Type: GrantFiled: January 22, 1982Date of Patent: April 10, 1984Assignee: Hoechst AktiengesellschaftInventors: Konrad Albrecht, Heinz Frensch, Hans Schumacher
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Patent number: 4409201Abstract: What are disclosed are pressure-resistant microcapsules comprising a polyamide shell having therein a structural mass of a polyurethane-polyurea polymer and an encapsulated water-immiscible liquid phase, and methods for making the same by dispersing a water-immiscible liquid phase in an aqueous phase and subsequently or simultaneously admixing therewith an aqueous solution of a diamine or polyamine, said dispersed phase comprising a polyamide forming acid compound, diisocyanate or polyisocyanate or a prepolymer thereof, and an inert organic aprotic hydrophilizing agent.Type: GrantFiled: May 29, 1981Date of Patent: October 11, 1983Assignee: Hoechst AktiengesellschaftInventors: Rudolf Heinrich, Heinz Frensch, Konrad Albrecht
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Patent number: 4244836Abstract: Microcapsules having a shell consisting of water-soluble polyvinyl alcohol and containing a liquid, water-in-soluble material are obtained by dispersing a liquid, water-insoluble phase of a substance, substance mixture or substance solution in an aqueous phase of polyvinyl alcohol obtained by partial hydrolysis of polyvinyl acetate and having a degree of hydrolysis of from 72 to 99 mol % and dehydrating the dispersion to obtain the capsules in powder form.Type: GrantFiled: February 5, 1979Date of Patent: January 13, 1981Assignee: Hoechst AktiengesellschaftInventors: Heinz Frensch, Rudolf Heinrich, Konrad Albrecht
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Patent number: 4230809Abstract: Pressure-resistant polyurethane-polyurea particles with textured internal mass prepared from a liquid phase immiscible with water and containing organic solvents, isocyanate prepolymers and optionally active substances or mixtures of active substances, the liquid phase being dispersed in an aqueous phase at temperatures of from 0.degree. C. to 95.degree. C., wherein the liquid organic phase contains as isocyanate prepolymer a reaction product of a stoichiometric excess of an aliphatic, aromatic, cycloaliphatic, or araliphatic di- or polyisocyanate with a di- or polyol, the reaction product having a mean molecular weight in the range of from about 300 to 10,000, and an alkyl and/or alkoxyalkyl acetate of the formula ##STR1## in which m is zero, 1 or 2, n is 1 to 4, and R is (C.sub.1 -C.sub.5)alkyl, and the aqueous phase contains a protective colloid and optionally a surface-active agent.Type: GrantFiled: December 19, 1978Date of Patent: October 28, 1980Assignee: Hoechst AktiengesellschaftInventors: Rudolf Heinrich, Heinz Frensch, Konrad Albrecht
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Patent number: 4144050Abstract: The invention is concerned with micro granules for pesticides and their manufacture by wet grinding a suspension of the active compound together with adjuvants in a ball mill to a particle size of at most 0.01 mm and subsequent spray-drying of the suspension thus obtained under a pressure of from 5 to 8 atmospheres gauge and at 140.degree. to 300.degree. C.Type: GrantFiled: March 21, 1977Date of Patent: March 13, 1979Assignee: Hoechst AktiengesellschaftInventors: Heinz Frensch, Konrad Albrecht, Klaus Hook
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Patent number: 4107318Abstract: Oily dispersions having an improved systemic fungicidal activity are composed of about 5 to 30% by weight of BCM, about 60 to 85% by weight of an aliphatic mineral oil having a flash point of from 65.degree. to 180.degree. C and a viscosity of from 1.5 to 30 centipoise at 20.degree. C, about 6 to 15% by weight of a combination of dispersible agents comprising a monoalkylphenol polyglycol ether having from 8 to 12 carbon atoms and a triisobutylphenol polyglycol ether and about 0.1 to 3% by weight of calcium (C.sub.8 - C.sub.15) monoalkylbenzene sulfonate.Type: GrantFiled: April 11, 1977Date of Patent: August 15, 1978Assignee: Hoechst AktiengesellschaftInventors: Konrad Albrecht, Heinz Frensch, Kurt Hartel
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Patent number: 4105775Abstract: Stable dispersions having an improved systemic fungicidal activity are composed of about 5 to 30% by weight of 2-benzimidazole-methyl-carbamate, about 60 to 85% by weight of liquid esters of (C.sub.1 - C.sub.12) monoalcohols and (C.sub.2 - C.sub.10) carboxylic acids, about 2 to 10% by weight of a combination of a (C.sub.8 - C.sub.12)-monoalkylphenol polyglycol ether and castor oil polyglycol ether and about 0.1 to 5% by weight of Ca-(C.sub.8 -C.sub.15)-monoalkyl-benzene sulfonate.Type: GrantFiled: April 11, 1977Date of Patent: August 8, 1978Assignee: Hoechst AktiengesellschaftInventors: Konrad Albrecht, Heinz Frensch, Kurt Hartel
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Patent number: 4078070Abstract: Dispersions of 2-methyl-5,6-dihydropyran-3-carboxylic acid anilide and benzimidazole-2-carbamic acid methyl ester or 1-n-butylcarbamoyl-benzimidazole-2-carbamic acid methyl ester in paraffinic mineral oils, liquid triglycerides and/or liquid esters of C.sub.1 to C.sub.12 monoalcohols have a synergistic effect against rust and other fungus diseases. The dispersions are stabilized against crystal growth by adding aluminum chelates of certain hydroxy-quinones, e.g., alizarin.Type: GrantFiled: September 9, 1975Date of Patent: March 7, 1978Assignee: Hoechst AktiengesellschaftInventors: Konrad Albrecht, Heinz Frensch, Kurt Hartel, Helmut Stingl
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Patent number: 4046906Abstract: Salts of benzimidazole-carbamic acid esters with certain organic sulfonic and sulfuric acid esters are substantially insoluble in water and soluble in organic solvents. These are valuable fungicides especially suitable for ultra low volume formulations.Type: GrantFiled: October 1, 1975Date of Patent: September 6, 1977Assignee: Hoechst AktiengesellschaftInventors: Heinz Frensch, Konrad Albrecht, Kurt Hartel
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Patent number: 4041164Abstract: Fungicidal dispersions comprising a carboxylic acid amide, other than pyracarbolide, as the fungicidally-active ingredient and an aluminum chelate of a polynuclear hydroxy-quinone as a crystal growth stabilizer, dispersed in a paraffinic mineral oil, a liquid triglyceride, or a liquid ester formed between a C.sub.1 -C.sub.12 monoalcohol and a C.sub.2 -C.sub.10 mono- or di-carboxylic acid.Type: GrantFiled: October 2, 1974Date of Patent: August 9, 1977Assignee: Hoechst AktiengesellschaftInventors: Konrad Albrecht, Heinz Frensch, Kurt Hartel
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Patent number: 3996375Abstract: Ultra-low volume formulations of endosulfan (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzod ioxathiepine-3-oxide), comprising endosulfan, a mixture of mono- or dicarboxylic acid (di)esters and aromatic hydrocarbons, and an epoxide stabilizer.Type: GrantFiled: December 26, 1974Date of Patent: December 7, 1976Assignee: Hoechst AktiengesellschaftInventors: Heinz Frensch, Konrad Albrecht, Norbert Taubel
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Patent number: 3987187Abstract: Dispersions of 2-methyl-5,6-dihydropyran-3-carboxylic acid anilide in paraffinic mineral oils, liquid triglycerides and/or liquid esters of C.sub.1 to C.sub.12 monoalcohols have an improved effect against rust diseases and an extended spectrum of effectiveness against diseases caused by Colletotrichum types. The dispersions can be stabilized against crystal growth by adding aluminum chelates of certain hydroxy quinones, e.g. allzarin.Type: GrantFiled: October 1, 1975Date of Patent: October 19, 1976Assignee: Hoechst AktiengesellschaftInventors: Konrad Albrecht, Heinz Frensch, Kurt Hartel
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Patent number: 3952102Abstract: Ultra low volume formulations of endosulfan (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzod ioxathiepine-3-oxide), comprising endosulfan, a mixture of a vegetable oil and aromatic hydrocarbons, and an epoxide stabilizer.Type: GrantFiled: December 26, 1974Date of Patent: April 20, 1976Assignee: Hoechst AktiengesellschaftInventors: Konrad Albrecht, Heinz Frensch, Klaus-Detlev Bock
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Patent number: 3950265Abstract: Stabilized aqueous dispersions of 2-alkyl-4,6-dinitrophenol esters, which comprise certain metal complex dyestuffs from the series of the azo dyestuff or phthalocyanine dyestuff complexes.Type: GrantFiled: March 27, 1974Date of Patent: April 13, 1976Assignee: Hoechst AktiengesellschaftInventors: Konrad Albrecht, Heinz Frensch
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Patent number: RE30700Abstract: Ultra-low volume formulations of endosulfan (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzod ioxathiepine-3-oxide), comprising endosulfan, a mixture of mono- or dicarboxylic acid (di)esters and aromatic hydrocarbons, and an epoxide stabilizer.Type: GrantFiled: January 12, 1979Date of Patent: August 4, 1981Assignee: Hoechst AktiengesellschaftInventors: Heinz Frensch, Konrad Albrecht, Klaus-Detlev Bock
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Patent number: RE30740Abstract: Ultra low volume formulations of endosulfan (6,7,8,9,10,10-hexachloro-1,5,5a,6,9,9a-hexahydro-6,9-methano-2,4,3-benzod ioxathiepine-3-oxide), comprising endosulfan, a mixture of a vegetable oil and aromatic hydrocarbons, and an epoxide stabilizer.Type: GrantFiled: January 12, 1979Date of Patent: September 8, 1981Assignee: Hoechst AktiengesellschaftInventors: Heinz Frensch, Konrad Albrecht, Norbert Taubel