Patents by Inventor Mitsumasa Kaitoh
Mitsumasa Kaitoh 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: 5294719Abstract: Compounds useful as a stabilizer for a variety of organic materials of an intermediate thereof, or as an intermediate of medicines or agricultural chemicals are disclosed, which are cyclohexylamine derivatives represented by the general formula [I]: ##STR1## wherein R.sup.1 represents a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an acyl group having 2 to 7 carbon atoms or an arylalkyl group having 7 to 10 carbon atoms; R.sup.2 represents a hydrogen atom or an alkyl group having 1 to 4 carbon atoms; R.sup.3 and R.sup.4 both represent a hydrogen atom, or one of R.sup.3 and R.sup.4 represents a hydrogen atom and the other represents a group --CH.sub.2 --R.sup.5, or R.sup.3 and R.sup.4 together form a group .dbd.CH--R.sup.5, in which R.sup.5 represents an unsubstituted or C.sub.1 -C.sub.4 alkyl substituted phenyl group, a 2-furyl group, a cyclohexyl group or a 2-tetrahydrofuryl group; X represents an alkylene group having 1 to 3 carbon atoms; and n denotes 1 or 2.Type: GrantFiled: December 23, 1992Date of Patent: March 15, 1994Assignee: Mitsubishi Petrochemical Company LimitedInventors: Hideki Kurokawa, Mitsumasa Kaitoh, Akiyoshi Ohnishi
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Patent number: 5260443Abstract: Disclosed is a piperidine derivatives of a formula: ##STR1## wherein R.sup.0 indicates a hydrogen atom or a group R--CO).sub.n where R is an alkyl, alkylene or arylene group capable of having 1 to 4 carboxylic group;R.sup.1 indicates a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an acyl group having 2 to 7 carbon atoms, or an arylalkyl group having 7 to 10 carbon atoms;R.sup.2 and R.sup.2' respectively indicate a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms;R.sup.3 and R.sup.4 in combination indicate a group .dbd.CH--R.sup.5, or R.sup.3 indicates a hydrogen atom and R.sup.4 indicates either --CH.sub.2 --R.sup.5 wherein R.sup.5 is a substituted or non-substituted phenyl group or a substituted or non-substituted cyclohexyl group the substituent being an alkyl having 1 to 4 carbon atoms, or a 2-furyl group or a tetrahydrofuryl group; andn indicates an integer of 1 to 4.The piperidine derivatives are improved photostabilizer to various organic materials including poly-.alpha.Type: GrantFiled: August 17, 1992Date of Patent: November 9, 1993Assignee: Mitsubishi Petrochemical Company LimitedInventors: Mitsumasa Kaitoh, Hideki Kurokawa, Akiyoshi Ohnishi
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Patent number: 5189172Abstract: Disclosed is a piperidine derivatives of a formula: ##STR1## wherein: R.sup.o indicates a hydrogen atom or a group R--CO).sub.n where R is an alkyl, alkylene or arylene group capable of having 1 to 4 carboxylic group;R.sup.1 indicates a hydrogen atom, an alkyl group having 1 to 4 carbon atoms, an acyl group having 2 to 7 carbon atoms, or an arylalkyl group having 7 to 10 carbon atoms;R.sup.2 and R.sup.2' respectively indicate a hydrogen atom, or an alkyl group having 1 to 4 carbon atoms;R.sup.3 and R.sup.4 in combination indicate a group .dbd.CH--R.sup.5, or R.sup.3 indicates a hydrogen atom and R.sup.4 indicates either --CH.sub.2 --R.sup.5 wherein R.sup.5 is a substituted or non-substituted phenyl group or a substituted or non-substituted cyclohexyl group the substituent being an alkyl having 1 to 4 carbon atoms, or a 2-furyl group or a tetrahydrofuryl group; andn indicates an integer of 1 to 4.The piperidine derivatives are improved photostabilizer to various organic materials including poly-.alpha.Type: GrantFiled: June 3, 1992Date of Patent: February 23, 1993Assignee: Mitsubishi Petrochemical Company LimitedInventors: Mitsumasa Kaitoh, Hideki Kurokawa, Akiyoshi Ohnishi
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Patent number: 5176969Abstract: Disclosed is an electrode for secondary battery, which comprises lithium or an alkali metal composed mainly of lithium doped as the active substance in a carrier composed of a mixture of a carbonaceous material satisfying the following conditions (A) and an organic polymer having ion conductivity of lithium.(A) a carbonaceous material with a hydrogen/carbon (H/C) atomic ratio of less than 0.15, a spacing (d.sub.002) of the (002) plane according to the X-ray wide angle diffraction method of 3.37 to 3.75 .ANG. and a crystallite size in the c-axis direction (Lc) of 5 .ANG. or more.Type: GrantFiled: April 23, 1991Date of Patent: January 5, 1993Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Mitsutaka Miyabayashi, Manabu Hayashi, Eiki Yasukawa, Kikuko Miyata, Mitsumasa Kaitoh, Hiroshi Yui
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Patent number: 4996334Abstract: A dibenzylidenesorbitol derivative having at least one nuclear substituent selected from an ester group represented by --COOR.sup.1 and an amido group represented by --CONR.sup.2 R.sup.3, wherein R.sup.1 represents a hydrocarbon group having 1 to 20 carbon atoms, and R.sup.2 and R.sup.3 are identical or different and each independently represents a hydrogen atom, an alkyl group, an aryl group or an aralkyl group.Type: GrantFiled: February 3, 1989Date of Patent: February 26, 1991Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Mitsumasa Kaitoh, Shoichiro Mori
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Patent number: 4935527Abstract: Alkaline earth metal salts of aziridine-2-carboxylic acid, typically Ca salt, are produced by a reaction of a 2,3-dihalopropionic acid derivative or an .alpha.-haloacrylic acid derivative with an aqueous ammonia in the presence of an alkaline earth metal hydroxide, typically Ca(OH).sub.2.Salts of aziridine-2-carboxylic acid are recovered from such a reaction product as referred to above by a liquid chromatographic technique in which a weak or weakened cation exchanger is utilized.Type: GrantFiled: December 23, 1988Date of Patent: June 19, 1990Assignee: Research Association for Utilization of Light OilInventors: Sadao Kitagawa, Takashi Yokoi, Mitsumasa Kaitoh
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Patent number: 4774355Abstract: A process for preparing a pentaerythritol-tetrakis(3-alkylthio-propionate) represented by the general formula: ##STR1## wherein R represents an alkyl group having from 8 to 30 carbon atoms, is disclosed, comprising reacting an alkylmercaptan having from 8 to 30 carbon atoms with an acrylic ester or an acrylic amide to form a 3-alkylthio-propionic acid ester or a 3-alkylthio-propionic acid amide, hydrolyzing the ester or amide to form a 3-alkylthio-propionic acid, and then reacting this product with pentaerythritol. The desired product can easily be obtained at high purity and high yield by this process.Type: GrantFiled: October 24, 1986Date of Patent: September 27, 1988Assignee: Mitsubishi Petrochemical Co., Ltd.Inventors: Hiroyuki Omori, Teruhiko Ishii, Mitsumasa Kaitoh, Shoichiro Mori
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Patent number: 4435251Abstract: Crude 2-methyleneglutaronitrile containing as impurities a metal halide, a trialkylamine, and the trimer or a higher polymer of acrylonitrile can be effectively purified by treating the crude 2-methyleneglutaronitrile with hydrochloric acid, sulfuric acid or nitric acid of a concentration of 1 to 30% by weight and then subjecting the treated methyleneglutaronitrile to vacuum distillation.Type: GrantFiled: December 28, 1981Date of Patent: March 6, 1984Assignee: Mitsubishi Petrochemical Company LimitedInventors: Makoto Takeda, Kazuhito Miyoshi, Mitsumasa Kaitoh, Hiroyuki Omori