Patents by Inventor Kazuaki Igarashi
Kazuaki Igarashi 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: 7078212Abstract: The invention relates to a mutant ?-amylase obtained by making replacement or deletion of at least one of amino acid residues such as the 167th Gln, 169th Tyr and 178th Ala in the amino acid sequence set forth in SEQ ID NO:1 in an ?-amylase having said amino acid sequence, or an ?-amylase having a homology of at least 70% to said amino acid sequence, a gene encoding the mutant ?-amylase, a vector, transformed cells, a process for producing a mutant ?-amylase, comprising culturing the transformed cells, and a detergent composition comprising the mutant ?-amylase. The mutant ?-amylase of the invention has excellent properties of high resistance to chelating agents, high specific activity in an alkaline region and excellent stability to heat, and is hence useful for detergents for automatic dish washer, laundry detergents and the like.Type: GrantFiled: June 9, 2000Date of Patent: July 18, 2006Assignee: Kao CorporationInventors: Keiji Endo, Kazuaki Igarashi, Yasuhiro Hayashi, Hiroshi Hagihara, Katsuya Ozaki
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Publication number: 20060121576Abstract: The present invention provides an M-1-P-producing enzyme which employs, as starting materials, an oligosaccharide or polysaccharide having a glucose polymerization degree of 5 or more and containing an ?-1,4-glycosidic bond such as maltooligosaccharide, dextrin, or starch, and which enables production of a large amount of M-1-P. The M-1-P-producing enzyme can produce M-1-P from a phosphoric acid or a salt thereof and an oligosaccharide or polysaccharide having a glucose polymerization degree of 5 or more and containing an ?-1,4-glycosidic bond.Type: ApplicationFiled: November 18, 2005Publication date: June 8, 2006Applicant: KAO CORPORATIONInventors: Kazuaki Igarashi, Shuichi Takizawa, Norihiko Higaki, Jun Hitomi
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Publication number: 20050200585Abstract: An array substrate includes m pixel columns in each of which n pixels PX are arranged in an effective display portion DSPeff, and dummy pixel columns obtained by arranging dummy pixels outside the effective display portion DSPeff. Each pixel and each dummy pixel include a switching element placed at the intersection of each scanning line and each signal line. One switching element is connected per row to each signal line. A switching element in the Nth row of the Mth pixel column and a switching element in the (N+1)th row of the (M+1)th pixel column are connected to the same signal line, and video signals having opposite polarities are supplied to adjacent signal lines.Type: ApplicationFiled: January 28, 2005Publication date: September 15, 2005Inventors: Kazuaki Igarashi, Kentaro Teranishi
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Publication number: 20050181493Abstract: The invention relates to a mutant ?-amylase obtained by making replacement or deletion of at least one of amino acid residues such as the 167th Gln, 169th Tyr and 178th Ala in the amino acid sequence set forth in SEQ ID NO:1 in an ?-amylase having said amino acid sequence, or an ?-amylase having a homology of at least 70% to said amino acid sequence, a gene encoding the mutant ?-amylase, a vector, transformed cells, a process for producing a mutant ?-amylase, comprising culturing the transformed cells, and a detergent composition comprising the mutant ?-amylase. The mutant ?-amylase of the invention has excellent properties of high resistance to chelating agents, high specific activity in an alkaline region and excellent stability to heat, and is hence useful for detergents for automatic dish washer, laundry detergents and the like.Type: ApplicationFiled: November 16, 2004Publication date: August 18, 2005Inventors: Keiji Endo, Kazuaki Igarashi, Yasuhiro Hayashi, Hiroshi Hagihara, Katsuya Ozaki
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Patent number: 6916645Abstract: Liquefying alkaline amylases, each having residual activity not less than 70% when treated at pH 10 and 45° C. for 30 minutes in the presence of 1 to 100 mM of EDTA or EGTA, are described. Also described are detergents comprising these amylases. In comparison with conventional amylases for detergents, the liquefying alkaline amylases of this invention have a high chelating-agent resisting performance.Type: GrantFiled: May 2, 2002Date of Patent: July 12, 2005Assignee: Kao CorporationInventors: Hiroshi Hagihara, Kaori Kitayama, Yasuhiro Hayashi, Kazuaki Igarashi, Keiji Endo, Katsuya Ozaki
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Publication number: 20050134544Abstract: An array substrate includes a plurality of signal lines (X1-Xm) in a display unit (DSP). One switching element is connected per row to each signal line. A switching element in the Nth row of the Mth pixel column and a switching element in the (N+1)th row of the (M+1)th pixel column are connected to the same signal line, and video signals having opposite polarities are supplied to adjacent signal lines.Type: ApplicationFiled: January 28, 2005Publication date: June 23, 2005Inventors: Kazuaki Igarashi, Kentaro Teranishi
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Publication number: 20050049437Abstract: A process for producing 2,4?-dihydroxydiphenylsulfone which comprises separating 4,4?-dihydroxydiphenylsulfone by crystallization from a mixture containing 4,4?-dihydroxydiphenylsulfone, 2,4?-dihydroxydiphenylsulfone, phenolsulfonic acid and phenol which is obtained by dehydration of phenol and sulfuric acid or phenolsulfonic acid to obtain a mixture having a content of 2,4?-dihydroxydiphenylsulfone greater than the content of 4,4?-dihydroxydiphenylsulfone, crystallizing 2,4?-dihydroxydiphenylsulfone by adjusting the composition of the solvent of the obtained mixture so that the ratio of the amounts by weight of phenol to water is 10:90 to 90:10, and separating 2,4?-dihydroxydiphenylsulfone by filtration; and a process as described above in which the filtrate obtained by the filtration is used as the raw material for the hydration.Type: ApplicationFiled: January 22, 2003Publication date: March 3, 2005Applicant: Nicca Chemical Co., Ltd.Inventors: Gou Yoshino, Yuichi Tomoda, Norihiro Taniguchi, Kazuaki Igarashi, Takeo Hasegawa
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Publication number: 20050012425Abstract: In the field of stators including divided tooth-shaped iron cores and core back iron cores, a stator is provided in which the tooth-shaped iron cores and the core back iron cores can be easily connected to each other, and the tooth-shaped iron cores and the core back iron cores can be prevented from coming off in the radial direction. In the stator of the present invention, a yoke (24) is formed such that the circumferential width thereof is greater at a radial-outer region than at a radial-inner region, i.e.Type: ApplicationFiled: July 17, 2002Publication date: January 20, 2005Inventors: Toshinori Tsukamoto, Hirofumi Atarashi, Yasuhiro Endo, Mitsuyoshi Takao, Akira Kato, Takeo Arai, Takeo Fukuda, Hiroyuki Kikuchi, Kazuaki Igarashi
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Patent number: 6838800Abstract: The stator includes core back iron cores disposed on outer circumferential sides between a plurality of teeth iron cores disposed at regular intervals of a predetermined distance in a predetermined circumferential direction. A stator winding is disposed on inner circumferential sides between the plurality of teeth iron cores. The stator winding is constituted by a plurality of wire bundles each of which is a bundle of a predetermined number of electric wires and which are connected in parallel with one another. The wire bundles are set so that the number of electric wires constituting a wire bundle located on the inner circumferential side between adjacent teeth iron cores is smaller than the number of electric wires constituting a wire bundle located on the outer circumferential side. Hence, the ratio (L/A) of the circumferential length L of each wire bundle to the sectional area A thereof is set at a value in a predetermined allowable range.Type: GrantFiled: October 2, 2002Date of Patent: January 4, 2005Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Mitsuyoshi Takao, Hirofumi Atarashi, Yasuhiro Endo, Akira Kato, Toshinori Tsukamoto, Keisuke Urushihara, Takeo Arai, Takeo Fukuda, Kazuaki Igarashi, Hiroyuki Kikuchi
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Publication number: 20040265959Abstract: The invention relates to mutant &agr;-amylases that may be produced at high yield from recombinant microorganisms.Type: ApplicationFiled: March 12, 2004Publication date: December 30, 2004Applicant: Kao CorporationInventors: Hiroyuki Araki, Keiji Endo, Hiroshi Hagihara, Kazuaki Igarashi, Yasuhiro Hayashi, Katsuya Ozaki
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Patent number: 6764841Abstract: The invention relates to a process for producing glucose-1-phosphate, which contains the steps of culturing bacteria of the genus Corynebacterium in a medium containing a saccharide and at least 1 mM of phosphoric acid or a derivative or salt thereof, and collecting glucose-1-phosphate produced and accumulated in the medium. A mass of G-1-P can be provided without conducting complicated steps which are required of the enzymatic process.Type: GrantFiled: January 24, 2002Date of Patent: July 20, 2004Assignee: Kao CorporationInventors: Kazuaki Igarashi, Katsuya Ozaki
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Patent number: 6743616Abstract: The invention relates to mutant &agr;-amylases that may be produced at high yield from recombinant microorganisms.Type: GrantFiled: October 9, 2001Date of Patent: June 1, 2004Assignee: Kao CorporationInventors: Hiroyuki Araki, Keiji Endo, Hiroshi Hagihara, Kazuaki Igarashi, Yasuhiro Hayashi, Katsuya Ozaki
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Patent number: 6689874Abstract: The present invention provides: a nucleotide sequence encoding alkaline pullulanase and exhibiting both alkaline &agr;-amylase and alkaline pullulanase activity; a nucleotide sequence encoding alkaline &agr;-amylase possessing an amino acid sequence described in SEQ ID NO:3; a nucleotide sequence encoding alkaline pullulanase possessing an amino acid sequence described in SEQ ID NO:4; recombinant DNAs containing these nucleotide sequences, and transformed microorganisms harboring the recombinant DNAs. The technique of the present invention enables mass production of alkaline pullulanase exhibiting both alkaline &agr;-amylase and alkaline pullulanase activity.Type: GrantFiled: December 14, 2001Date of Patent: February 10, 2004Assignee: Kao CorporationInventors: Yuji Hatada, Kazuaki Igarashi, Katsuya Ozaki, Katsutoshi Ara, Shuji Kawai, Susumu Ito
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Publication number: 20030067241Abstract: The stator includes core back iron cores disposed on outer circumferential sides between a plurality of teeth iron cores disposed at regular intervals of a predetermined distance in a predetermined circumferential direction. A stator winding is disposed on inner circumferential sides between the plurality of teeth iron cores. The stator winding is constituted by a plurality of wire bundles each of which is a bundle of a predetermined number of electric wires and which are connected in parallel with one another. The wire bundles are set so that the number of electric wires constituting a wire bundle located on the inner circumferential side between adjacent teeth iron cores is smaller than the number of electric wires constituting a wire bundle located on the outer circumferential side. Hence, the ratio (L/A) of the circumferential length L of each wire bundle to the sectional area A thereof is set at a value in a predetermined allowable range.Type: ApplicationFiled: October 2, 2002Publication date: April 10, 2003Applicant: HONDA GIKEN KOGYO KABUSHIKI KAISHAInventors: Mitsuyoshi Takao, Hirofumi Atarashi, Yasuhiro Endo, Akira Kato, Toshinori Tsukamoto, Keisuke Urushihara, Takeo Arai, Takeo Fukuda, Kazuaki Igarashi, Hiroyuki Kikuchi
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Patent number: 6509183Abstract: A DNA fragment coding for alkaline pullulanase, which contains about 6.3 Kb base pairs and has a restriction map shown in FIG. 2, a recombinant vector containing the DNA fragment, and a microorganism carrying the vector. Also disclosed is a method of preparing alkaline pullulanase which comprises culturing a transformant microorganism which has been transformed with a recombinant vector containing a DNA fragment coding for alkaline pullulanase, having a restriction enzyme map shown in FIG. 2 and having about 6.3 Kb base pairs. According to the method of the invention, alkaline pullulanase which is useful as a component of detergents can be mass-produced in a low cost.Type: GrantFiled: September 28, 1994Date of Patent: January 21, 2003Assignee: Kao CorporationInventors: Katsutoshi Ara, Kazuaki Igarashi, Katsuhisa Saeki, Shuji Kawai, Susumu Ito
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Publication number: 20020197698Abstract: Liquefying alkaline amylases, each having residual activity not less than 70% when treated at pH 10 and 45° C. for 30 minutes in the presence of 1 to 100 mM of EDTA or EGTA, are described. Also described are detergents comprising these amylases. In comparison with conventional amylases for detergents, the liquefying alkaline amylases of this invention have a high chelating-agent resisting performance.Type: ApplicationFiled: May 2, 2002Publication date: December 26, 2002Applicant: Kao CorporationInventors: Hiroshi Hagihara, Kaori Kitayama, Yasuhiro Hayashi, Kazuaki Igarashi, Keiji Endo, Katsuya Ozaki
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Publication number: 20020182699Abstract: The present invention provides: a nucleotide sequence encoding alkaline pullulanase and exhibiting both alkaline &agr;-amylase and alkaline pullulanase activity; a nucleotide sequence encoding alkaline &agr;-amylase possessing an amino acid sequence described in SEQ ID NO:3; a nucleotide sequence encoding alkaline pullulanase possessing an amino acid sequence described in SEQ ID NO:4; recombinant DNAs containing these nucleotide sequences, and transformed microorganisms harboring the recombinant DNAs. The technique of the present invention enables mass production of alkaline pullulanase exhibiting both alkaline &agr;-amylase and alkaline pullulanase activity.Type: ApplicationFiled: December 14, 2001Publication date: December 5, 2002Applicant: Kao CorporationInventors: Yuji Hatada, Kazuaki Igarashi, Katsuya Ozaki, Katsutoshi Ara, Shuji Kawai, Susumu Ito
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Patent number: 6486113Abstract: The invention relates to a mutant &agr;-amylase having an amino acid sequence obtained by making deletion or replacement by another arbitrary amino acid residue of at least a methionine residue at the 202-position or a position homologous thereto among amino acid residues set forth in SEQ ID NO:1, which constitute a liquefying alkaline &agr;-amylase, a gene thereof, and a detergent composition comprising the mutant &agr;-amylase. The mutant &agr;-amylase has the optimum pH in an alkaline range, an excellent &agr;-amylase activity, and high and lasting resistance to oxidizing agents, and is hence particularly useful as a component of detergent compositions containing a bleaching agent and an oxidizing agent.Type: GrantFiled: September 23, 1999Date of Patent: November 26, 2002Assignee: Kao CorporationInventors: Yuji Hatada, Kaori Ikawa, Susumu Ito, Kazuaki Igarashi, Hiroshi Hagihara, Yasuhiro Hayashi, Hiroyuki Araki, Katsuya Ozaki
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Publication number: 20020150998Abstract: The invention relates to a process for producing glucose-1-phosphate, which contains the steps of culturing bacteria of the genus Corynebacterium in a medium containing a saccharide and at least 1 mM of phosphoric acid or a derivative or salt thereof, and collecting glucose-1-phosphate produced and accumulated in the medium.Type: ApplicationFiled: January 24, 2002Publication date: October 17, 2002Applicant: Kao CorporationInventors: Kazuaki Igarashi, Katsuya Ozaki
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Publication number: 20020123124Abstract: Provided are highly productive mutant &agr;-amylases which are derived from an &agr;-amylase having an amino acid sequence represented by SEQ ID No. 1 or 2 or showing at least 60% homology thereto and are constructed so that a specific amino acid residue taking part in productivity is deleted or substituted with another amino acid residue, a gene encoding the mutant &agr;-amylase, vector, transformant cell, a method for producing the mutant &agr;-amylase, which comprises cultivating the transformant cell, and a detergent composition containing the mutant &agr;-amylase.Type: ApplicationFiled: October 9, 2001Publication date: September 5, 2002Applicant: KAO CORPORATIONInventors: Hiroyuki Araki, Keiji Endo, Hiroshi Hagihara, Kazuaki Igarashi, Yasuhiro Hayashi, Katsuya Ozaki