Patents by Inventor Yuko Ishihara
Yuko Ishihara 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: 6161214Abstract: A method is presented of generating data on component arrangement capable of shortening the moving distance of the mounting head in an electronic component mounting machine, and enhancing the mounting efficiency.The distribution center coordinates and their distributed state values of electronic components on a circuit board grouped in accordance with their kind are determined. The arrangement position of each electronic component at a component feed section is determined based on the distribution center coordinates. When the arrangement positions of more than two kinds of electronic components thus determined are the same, the arrangement position of the electronic component having a smaller distributed state value is preferentially determined.Type: GrantFiled: March 6, 1998Date of Patent: December 12, 2000Assignee: Matsushita Electric Industrial Co., Ltd.Inventors: Yuko Ishihara, Yasuhiro Maenishi
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Patent number: 6040111Abstract: Disclosed are an aromatic hydroxycarboxylic acid resin represented by the following formula (1): ##STR1## wherein each A group is the same or different and individually represents a substituted or unsubstituted phenylene or naphthylene group, R.sup.1 represents a hydrogen atom or a C.sub.1-4 alkyl group, R.sup.2 represents a hydrogen atom or a C.sub.1-10 alkyl, C.sub.1-10 alkoxyl, nitro or hydroxyl group, l stands for an integer of 0-100, m stands for an integer of 0-20 and n stands for an integer of 0-3 with the proviso that m stands for an integer other than 0 when all of the A group represent an unsubstituted or substituted phenylene group, a preparation process thereof and use of the same.Type: GrantFiled: December 18, 1997Date of Patent: March 21, 2000Assignee: Mitsui Chemicals, Inc.Inventors: Akio Karasawa, Akihiro Yamaguchi, Keizaburo Yamaguchi, Yuko Ishihara
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Patent number: 5798422Abstract: Disclosed are an aromatic hydroxycarboxylic acid resin represented by the following formula (1): ##STR1## wherein each A group is the same or different and individually represents a substituted or unsubstituted phenylene or naphthylene group, R.sup.1 represents a hydrogen atom or a C.sub.1-4 alkyl group, R.sup.2 represents a hydrogen atom or a C.sub.1-10 alkyl, C.sub.1-10 alkoxyl, nitro or hydroxyl group, l stands for an integer of 0-100, m stands for an integer of 0-20 and n stands for an integer of 0-3 with the proviso that m stands for an integer other than 0 when all of the A group represent an unsubstituted or substituted a group, a preparation process thereof and use of the same.Type: GrantFiled: August 7, 1995Date of Patent: August 25, 1998Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Akio Karasawa, Akihiro Yamaguchi, Keizaburo Yamaguchi, Yuko Ishihara
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Patent number: 5710334Abstract: This invention relates to a novel thermoplastic and amorphous polyimide which is readily soluble in organic solvent, a novel aromatic diamino compound used for the polyimide, a preparation process thereof, a polyimide-based resin composition comprising the thermoplastic polyimide and a fibrous reinforcement, a process for preparing the resin composition, an injection molded article of the resin composition, a polyimide-based composite obtained by molding the above soluble and thermoplastic polyimide in combination with a fibrous reinforcement, and a fibrous reinforcement having a surface modified with the above polyimide.Type: GrantFiled: May 26, 1995Date of Patent: January 20, 1998Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Yuko Ishihara, Mitsunori Matsuo, Keizaburo Yamaguchi, Akihiro Yamaguchi
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Patent number: 5480965Abstract: This invention relates to a novel thermoplastic and amorphous polyimide which is readily soluble in organic solvent, a novel aromatic diamino compound used for the polyimide, a preparation process thereof, a polyimide-based resin composition comprising the thermoplastic polyimide and a fibrous reinforcement, a process for preparing the resin composition, an injection molded article of the resin composition, a polyimide-based composite obtained by molding the above soluble and thermoplastic polyimide in combination with a fibrous reinforcement, and a fibrous reinforcement having a surface modified with the above polyimide.Type: GrantFiled: July 26, 1994Date of Patent: January 2, 1996Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Wataru Yamashita, Yuichi Okawa, Hideaki Oikawa, Tadashi Asanuma, Yuko Ishihara, Mitsunori Matsuo, Keizaburo Yamaguchi, Akihiro Yamaguchi, Shoji Tamai
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Patent number: 5354890Abstract: A heat-resistant and thermoplastic polyimide which has low dielectric characteristics and recurring structural units of the following formula: ##STR1## wherein R is a tetravalent radical having from 2 to 27 carbon atoms and selected from the group consisting of an aliphatic radical, alicyclic radical, monoaromatic radical, condensed polyaromatic radical and noncondensed aromatic radical connected each other with a direct bond or a bridge member; aromatic diamines which are useful for the raw material monomers of the polyimide and have following formulas: ##STR2## and a process for preparing the polyimide of the above formula by reacting these aromatic diamines with a tetracarboxylic dianhydride in the presence of an aromatic dicarboxylic anhydride or aromatic monoamine, and successively thermally or chemically imidizing the resultant polyamic acid; are disclosed.Type: GrantFiled: June 24, 1993Date of Patent: October 11, 1994Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shoji Tamai, Wataru Yamashita, Yuichi Okawa, Yuko Ishihara, Keizaburo Yamaguchi, Akihiro Yamaguchi
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Patent number: 5322962Abstract: Disclosed are a novel aromatic diamine; a polymide comprising 1,3-bis(3-aminobenzoyl)benzene or 4,4'-bis(3-aminobenzoyl)biphenyl as a diamine component and having recurring structural units represented by the formula (III): ##STR1## wherein R is a tetravalent radical selected from the group consisting of an aliphatic radical having from 2 to 27 carbon atoms, alicyclic radical, monoaromatic radical, condensed polyaromatic radical, and noncondensed aromatic radical connected each other with a direct bond or a bridge member, and X is a divalent radical of ##STR2## and a polyimide having a terminal aromatic group which is essentially unsubstituted or substituted with a radical having no reactivity with amines or dicarboxylic acid anhydrides or a composition comprising said polyimide.Type: GrantFiled: May 12, 1993Date of Patent: June 21, 1994Assignee: Mitsui Toatsu Chemicals, Inc.Inventors: Shoji Tamai, Keizaburo Yamaguchi, Yuko Ishihara, Saburo Kawashima, Hideaki Oikawa, Toshiyuki Kataoka, Akihiro Yamaguchi
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Patent number: 5260388Abstract: A heat-resistant and thermoplastic polyimide which has low dielectric characteristics and recurring structural units of the following formula ##STR1## wherein R is a tetravalent radical having from 2 to 27 carbon atoms and selected from the group consisting of an aliphatic radical, alicyclic radical, monoaromatic radical, condensed polyaromatic radical and noncondensed aromatic radical connected each other with a direct bond or a bridge member; aromatic diamines which are useful for the raw material monomers of the polyimide and have following formulas: ##STR2## and ##STR3## and a process for preparing the polyimide of the above formula by reacting these aromatic diamines with a tetracarboxylic dianhydride in the presence of an aromatic dicarboxylic anhydride or aromatic monoamine, and successively thermally or chemically imidizing the resultant polyamic acid.Type: GrantFiled: June 8, 1992Date of Patent: November 9, 1993Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Shoji Tamai, Wataru Yamashita, Yuichi Okawa, Yuko Ishihara, Keizaburo Yamaguchi, Akihiro Yamaguchi
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Patent number: 5231160Abstract: A novel aromatic diamine; a polyimide comprising 1,3-bis(3-aminobenzoyl)benzene or 4,4'-bis(3-aminobenzoyl)biphenyl as a diamine component and having recurring structural units represented by the formula (III): ##STR1## wherein R is a tetravalent radical selected from the group consisting of an aliphatic radical having from 2 to 27 carbon atoms, alicyclic radical, monoaromatic radical, condensed polyaromatic radical, and noncondensed aromatic radical connected each other with a direct bond or a bridge member, and X is a divalent radical of ##STR2## and a polyimide having a terminal aromatic group which is essentially unsubstituted or substituted with a radical having no reactivity with amines or dicarboxylic acid anhydrides or a composition comprising said polyimide.Type: GrantFiled: August 29, 1991Date of Patent: July 27, 1993Assignee: Mitsui Toatsu Chemicals, IncorporatedInventors: Shoji Tamai, Keizaburo Yamaguchi, Yuko Ishihara, Saburo Kawashima, Hideaki Oikawa, Toshiyuki Kataoka, Akihiro Yamaguchi