Patents by Inventor Kazuhiro Matsumura
Kazuhiro Matsumura 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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Publication number: 20230383208Abstract: A lubricant base oil of the present invention includes an ester compound including: a structural moiety (A) that is derived from an alcohol compound (A); and a structural moiety (B) that is derived from a carboxylic acid, the structural moiety B including: a structural moiety (B1) that is derived from a monocarboxylic acid (B1); and a structural moiety (B2) that is derived from an aliphatic monocarboxylic acid (B2) having 4 or more and 18 or less carbon atoms. According to the present invention, it is possible to provide a lubricant base oil having excellent low-temperature stability and high heat resistance while maintaining torque-lowering properties.Type: ApplicationFiled: November 10, 2021Publication date: November 30, 2023Applicant: KAO CORPORATIONInventor: Kazuhiro MATSUMURA
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Publication number: 20230361713Abstract: A motor control method controls a motor having windings of a plurality of phases and a cooling water channel. The motor control calculates an estimated maximum temperature of the winding of the phase that reaches a highest temperature from among the windings of the plurality of phases based on the input electrical power when the motor is in a lock state. The motor control further calculates an offset value based on a detected temperature of the windings and a detected temperature of the cooling water, and corrects the estimated maximum temperature based on the temperature of the windings and the offset value. The motor control further controls the input electrical power according to the estimated maximum temperature.Type: ApplicationFiled: May 17, 2021Publication date: November 9, 2023Inventors: Tomoaki KAIMORI, Kazuhiko MATSUMOTO, Kazuhiro MATSUMURA
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Patent number: 7266158Abstract: A radio communication equipment is provided with a clock generating section which generate an operation clock signal for a communication permitting period in which communication with an external device is permitted by carrying data over electric wave and a power-down clock signal for non-communication period respectively based on control signals. A high-speed counter is provided for counting an operation clock signal for controlling the communication permitting period. A low-speed slot counter is provided for counting a power-down clock signal for controlling the non-communication period. A clock control section is provided for outputting the count value of the high speed counter and the count value of the low speed counter, and continues to count a count value between the high speed slot counter and the low speed counter.Type: GrantFiled: May 20, 2003Date of Patent: September 4, 2007Assignee: Sharp Kabushiki KaishaInventor: Kazuhiro Matsumura
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Publication number: 20040042541Abstract: A radio communication equipment is provided with a clock generating section which generate an operation clock signal for a communication permitting period in which communication with an external device is permitted by carrying data over electric wave and a power-down clock signal for non-communication period respectively based on control signals. A high-speed counter is provided for counting an operation clock signal for controlling the communication permitting period. A low-speed slot counter is provided for counting a power-down clock signal for controlling the non-communication period. A clock control section is provided for outputting the count value of the high speed counter and the count value of the low speed counter, and continues to count a count value between the high speed slot counter and the low speed counter.Type: ApplicationFiled: May 20, 2003Publication date: March 4, 2004Inventor: Kazuhiro Matsumura
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Patent number: 4304892Abstract: A process for producing a solid titanium trichloride catalyst which comprisesat a temperature of -40.degree. C. to 40.degree. C. mixing titanium tetrachloride with an organo-aluminum compound of the formula (I):AlR.sub.n X.sub.3-n (I)wherein R has up to 10 carbon atoms and is an aliphatic hydrocarbon group which may be straight chain, branched chain or cyclic, or an aromatic hydrocarbon group; X is a halogen atom or a hydrogen atom; and n is a number satisfying the relation, 1.5.ltoreq.n.ltoreq.3;in the presence of an ether compound of the formula (II):R.sup.2 OR.sup.3 (II)wherein R.sup.2 and R.sup.3, which may be the same or different, each is an alkyl group, an aralkyl group or an alkenyl group, each having up to 10 carbon atoms, to reduce the titanium tetrachloride; maintaining the mixed solution at a temperature of 10.degree. C. to 50.degree. C.Type: GrantFiled: July 8, 1980Date of Patent: December 8, 1981Assignee: Sumitomo Chemical Co., Ltd.Inventors: Akinobu Shiga, Yoshiharu Fukui, Kazuhiro Matsumura, Toshio Sasaki, Masahisa Okawa
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Patent number: 4246135Abstract: A process for producing a solid titanium trichloride catalyst which comprisesat a temperature of -40.degree. C. to 40.degree. C. mixing titanium tetrachloride with an organo-aluminum compound of the formula (I):AlR.sub.n X.sub.3-n (I)wherein R has up to 10 carbon atoms and is an aliphatic hydrocarbon group which may be straight chain, branched chain or cyclic, or an aromatic hydrocarbon group; X is a halogen atom or a hydrogen atom; and n is a number satisfying the relation, 1.5.ltoreq.n.ltoreq.3; in the presence of an ether compound of the formula (II):R.sup.2 OR.sup.3 (II)wherein R.sup.2 and R.sup.3, which may be the same or different, each is an alkyl group, an aralkyl group or an alkenyl group, each having up to 10 carbon atoms, to reduce the titanium tetrachloride; maintaining the mixed solution at a temperature of 10.degree. C. to 50.degree. C.Type: GrantFiled: May 23, 1979Date of Patent: January 20, 1981Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Shiga, Yoshiharu Fukui, Kazuhiro Matsumura, Toshio Sasaki, Masahisa Okawa
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Patent number: 4243786Abstract: A solid catalyst for polymerization of olefins prepared by treatment of a titanium trichloride composition with a mixture of (1) a halogen, an interhalogen compound or a halogenated hydrocarbon compound, and (2) an ether which, in combination with organoaluminum compounds as activators, can be used to polymerize olefins for the efficient production of highly crystalline olefin polymers.Type: GrantFiled: April 13, 1979Date of Patent: January 6, 1981Assignee: Sumitomo Chemical Co., Ltd.Inventors: Akinobu Shiga, Yoshiharu Fukui, Kazuhiro Matsumura, Toshio Sasaki, Masahisa Okawa
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Patent number: 4217432Abstract: A solid catalyst for olefin polymerization which is obtained by the catalytic treatment of a titanium trichloride composition with a mixture of a halogenated hydrocarbon and an ether, the composition being produced by subjecting a solid reduction product, which is obtained by reduction of titanium tetrachloride with an organo-aluminum compound, to heat treatment or to catalytic treatment with a specific organo-aluminum compound, aluminum halide, an ether and the like. In the polymerization of an olefin, combined catalyst systems of this solid catalyst and organo-aluminum compounds as activators can be used for efficient production of olefin polymers having a high crystallinity.Type: GrantFiled: August 2, 1978Date of Patent: August 12, 1980Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Shiga, Yoshiharu Fukui, Kazuhiro Matsumura, Toshio Sasaki, Masahisa Ohkawa
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Patent number: 4183824Abstract: A method for preparing a solid catalyst comprising reacting a titanium trichloride composition with a mixture of(1) an ether compound and carbon atom and represented by the general formula (IV): ##STR1## wherein R.sup.5, R.sup.6 and R.sup.7, which may be the same or different, each has up to 18 carbon atoms and represents an aliphatic hydrocarbon group, which may be straight chain, branched chain or cyclic, or an aromatic hydrocarbon group, with at least one of R.sup.5, R.sup.6 and R.sup.7 being an aromatic hydrocarbon group, with at least one of R.sup.5, R.sup.6 and R.sup.7 being an aromatic hydrocarbon group, the amount of the hydrocarbon compound being about 0.01 to about 10 moles per mole of titanium trichloride in the titanium trichloride composition; and/or(2) (b) an organic sulfur compound represented by the general formulas (VI) and (VIII):R.sup.9 --S--S--R.sup.10 (V)HS--(CH.sub.2).sub.d --SH (VI)wherein each of R.sup.9 and R.sup.Type: GrantFiled: March 10, 1978Date of Patent: January 15, 1980Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Shiga, Yoshiharu Fukui, Kazuhiro Matsumura, Toshio Sasaki, Masahisa Okawa
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Patent number: 4165298Abstract: A solid catalyst for polymerization of olefins prepared by treatment of a titanium trichloride composition with a mixture of (1) a halogen, an interhalogen compound or a halogenated hydrocarbon compound, and (2) an ether which, in combination with organoaluminum compounds as activators, can be used to polymerize olefins for the efficient production of highly crystalline olefin polymers.Type: GrantFiled: September 8, 1977Date of Patent: August 21, 1979Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Shiga, Yoshiharu Fukui, Kazuhiro Matsumura, Toshio Sasaki, Masahisa Okawa
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Patent number: 4123387Abstract: A solid catalyst for olefin polymerization which is obtained by the catalytic treatment of a titanium trichloride composition with a mixture of a halogenated hydrocarbon and an ether, the composition being produced by subjecting a solid reduction product, which is obtained by reduction of titanium tetrachloride with an organo-aluminum compound, to heat treatment or to catalytic treatment with a specific organo-aluminum compound, aluminum halide, an ether and the like. In the polymerization of an olefin, combined catalyst systems of this solid catalyst and organo-aluminum compounds as activators can be used for efficient production of olefin polymers having a high crystallinity.Type: GrantFiled: March 14, 1977Date of Patent: October 31, 1978Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Shiga, Yoshiharu Fukui, Kazuhiro Matsumura, Toshio Sasaki, Masahisa Ohkawa
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Patent number: 3960765Abstract: A process for preparing a solid catalyst for the polymerization of olefins which comprises the steps of (1) reducing titanium tetrachloride with an organoaluminum compound, (2) treating the resulting .beta.-type titanium trichloride with a complexing agent, (3) treating the solid catalyst thus obtained with an organoaluminum compound, and (4) treating the resulting solid catalyst with a complexing agent, and a solid catalyst for the polymerization of olefins prepared by the above process.Type: GrantFiled: November 4, 1974Date of Patent: June 1, 1976Assignee: Sumitomo Chemical Company, LimitedInventors: Akinobu Shiga, Yoshiharu Fukui, Kazuhiro Matsumura, Satoru Uchida