Patents by Inventor Hiromasa Kawai
Hiromasa Kawai 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: 8697240Abstract: A photocurable resin composition including: (A) a urethane (meth)acrylate oligomer having a polyoxyalkylene structure, (B) a (meth)acrylic polymer, (C) a (meth)acrylic monomer, and (D) a photopolymerization initiator, wherein the component (A) is produced using monomer components including (a1) a polyoxyalkylene polyol, (a2) a polyisocyanate, and (a3) a hydroxyl group-containing mono(meth)acrylate compound, a relationship N (=n1/n2) between the total mass n1 of the monomer components and the total equivalent weight n2 of acryloyl groups within the all monomer components is 4,000 or greater, and the component (A) is substantially free of unreacted isocyanate groups.Type: GrantFiled: July 15, 2010Date of Patent: April 15, 2014Assignee: Hitachi Chemical Company, Ltd.Inventors: Yoshinobu Ogawa, Futoshi Oikawa, Hiromasa Kawai
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Publication number: 20120114953Abstract: A photocurable resin composition including: (A) a urethane (meth)acrylate oligomer having a polyoxyalkylene structure, (B) a (meth)acrylic polymer, (C) a (meth)acrylic monomer, and (D) a photopolymerization initiator, wherein the component (A) is produced using monomer components including (a1) a polyoxyalkylene polyol, (a2) a polyisocyanate, and (a3) a hydroxyl group-containing mono(meth)acrylate compound, a relationship N (=n1/n2) between the total mass n1 of the monomer components and the total equivalent weight n2 of acryloyl groups within the all monomer components is 4,000 or greater, and the component (A) is substantially free of unreacted isocyanate groups.Type: ApplicationFiled: July 15, 2010Publication date: May 10, 2012Inventors: Yoshinobu Ogawa, Futoshi Oikawa, Hiromasa Kawai
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Patent number: 7626281Abstract: An energy converter comprises a flexible plane unit 1 placed in a position to be exposed to a flow of fluid such as wind, at least a part of peripheral edge of the flexible plane unit 1 being capable of fluttering freely with the flow, an energy conversion unit 31 for converting vibration energy into electric energy, and a transmission unit 2 connected to the flexible plane unit 1 and for transmitting a vibration caused on the flexible plane unit by the flow to the energy conversion unit 31.Type: GrantFiled: October 19, 2005Date of Patent: December 1, 2009Assignee: Kyoto UniversityInventor: Hiromasa Kawai
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Publication number: 20090121489Abstract: An energy converter comprises a flexible plane unit 1 placed in a position to be exposed to a flow of fluid such as wind, at least a part of peripheral edge of the flexible plane unit 1 being capable of fluttering freely with the flow, an energy conversion unit 31 for converting vibration energy into electric energy, and a transmission unit 2 connected to the flexible plane unit 1 and for transmitting a vibration caused on the flexible plane unit by the flow to the energy conversion unit 31.Type: ApplicationFiled: October 19, 2005Publication date: May 14, 2009Applicant: Kyoto UniversityInventor: Hiromasa Kawai
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Publication number: 20040152862Abstract: The present invention relates to an optical resin comprising a poly(benzoazole) having repeating units represented by the following general formula (1) as a constituent; and an optical waveguide, an optical filter and an optical lens prepared using the optical resin: 1Type: ApplicationFiled: January 26, 2004Publication date: August 5, 2004Applicant: Hitachi Chemical Co., Ltd.Inventors: Toshihiko Takasaki, Hikaru Urano, Hiromasa Kawai
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Publication number: 20040115677Abstract: The present invention relates to microtiter plates for use in automated systems. Specifically, the present invention relates to microtiter plates which are thermally stable under conditions required for polymerase chain reaction (PCR) experiments, while also maintaining the rigidity and dimensions necessary for mechanical manipulation in automated systems.Type: ApplicationFiled: January 26, 2004Publication date: June 17, 2004Inventors: Masato Mitsuhashi, Takayuki Saito, Hiromasa Kawai, Chikashi Takase
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Patent number: 6277938Abstract: A process for the preparation of a non-birefringent optical resin, characterized by copolymerizing a monomer mixture consisting of the following monomers (A) to (E) at such a ratio as to give the resin having an absolute value of orientational birefringence of less than 1×10−6; wherein (A): 5 to 40 wt % of a methacrylic or acrylic ester having a C5-C22 aliphatic hydrocarbon group in the ester moiety; (B): 50 to 80 wt % of methyl methacrylate; (C): 5 to 40 wt % of an N-substituted maleimide; (D): 0 to 30 wt % of benzyl methacrylate; (E): 0 to 10 wt % of a monomer copolymerizable with these monomers, and optical elements made by using the resin prepared by this process.Type: GrantFiled: August 3, 1999Date of Patent: August 21, 2001Assignee: Hitachi Chemical Co., Ltd.Inventors: Yasuhiro Koike, Akihiro Yoshida, Hiromasa Kawai, Minoru Suzuki
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Patent number: 5663264Abstract: A transparent resin obtained by polymerizing a monomer having an alkylene oxide group, a polyfunctional (meth)acrylate having a divalent branched hydrocarbon group and other copolymerizable vinyl monomer, if necessary, is suitable as an elementary material for a plastic lens with excellent heat resistance and hue.Type: GrantFiled: December 21, 1994Date of Patent: September 2, 1997Assignee: Hitachi Chemical Company, Ltd.Inventors: Toshiyasu Kawai, Minoru Suzuki, Hiromasa Kawai, Fumiaki Kanega
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Patent number: 5583191Abstract: A transparent resin obtained by polymerizing a monomer having an alkylene oxide group, a polyfunctional (meth)acrylate having a divalent branched hydrocarbon group and other copolymerizable vinyl monomer, if necessary, is suitable as an elementary material for a plastic lens with excellent heat resistance and hue.Type: GrantFiled: June 5, 1995Date of Patent: December 10, 1996Assignee: Hitachi Chemical Company, Ltd.Inventors: Toshiyasu Kawai, Minoru Suzuki, Hiromasa Kawai, Fumiaki Kanega
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Patent number: 5559200Abstract: A transparent resin obtained by polymerizing styrene, a methacrylic or acrylic acid ester, a polyfunctional monomer, and if necessary a copolymerizable vinyl monomer in the presence of a molecular weight modifier is suitable for producing a polymer lens having a low specific gravity, and excellent in transparency, edging ability with other good properties.Type: GrantFiled: June 6, 1995Date of Patent: September 24, 1996Assignee: Hitachi Chemical Company, Ltd.Inventors: Minoru Suzuki, Akihiro Sasaki, Hiromasa Kawai, Fumiaki Kanega
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Patent number: 5449731Abstract: A transparent resin obtained by polymerizing styrene, a methacrylic or acrylic acid ester, a polyfunctional monomer, and if necessary a copolymerizable vinyl monomer in the presence of a molecular weight modifier is suitable for producing a polymer lens having a low specific gravity, and excellent in transparency, edging ability with other good properties.Type: GrantFiled: September 30, 1993Date of Patent: September 12, 1995Assignee: Hitachi Chemical Company, Ltd.Inventors: Minoru Suzuki, Akihiro Sasaki, Hiromasa Kawai, Fumiaki Kanega
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Patent number: 5155190Abstract: An optical resin obtained by polymerizing 97 to 50% by weight of methyl methacrylate, 3 to 30% by weight of an N-substituted maleimide, and 0 to 40% by weight of an unsaturated monomer by suspension polymerization at a pH of 5.5 to 7.5 is excellent in heat resistance and transparency.Type: GrantFiled: May 28, 1991Date of Patent: October 13, 1992Assignee: Hitachi Chemical CompanyInventors: Takaaki Okinaka, Kiyomi Sugawara, Hiromasa Kawai, Fumiaki Kanega
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Patent number: 4986648Abstract: An optical resin material comprising a polymer containing as an essential component at least one norbornyl acrylate or methacrylate or a derivative thereof is excellent in properties, particularly in moisture resistance and can be used for molding optical elements such as lenses, optical discs, etc.Type: GrantFiled: December 21, 1988Date of Patent: January 22, 1991Assignee: Hitachi Chemical Company, Ltd.Inventors: Akihiro Kobayashi, Toshiyuki Fujita, Takayuki Saito, Hiromasa Kawai, Yutaka Hosoi, Hideaki Shibata
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Patent number: 4868261Abstract: An optical resin material comprising a polymer containing as an essential component at least one norbornyl acrylate or methacrylate or a derivative thereof is excellent in properties, particularly in moisture resistance and can be used for molding optical elements such as lenses, optical discs, etc.Type: GrantFiled: June 18, 1987Date of Patent: September 19, 1989Assignee: Hitachi Chemical Company, Ltd.Inventors: Akihiro Kobayashi, Toshiyuki Fujita, Takayuki Saito, Hiromasa Kawai, Yutaka Hosoi, Hideaki Shibata
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Patent number: 4591626Abstract: A polymer obtained by polymerizing tricyclo[5.2.1.0.sup.2,6 ]deca-8-yl acrylate or methacrylate in an amount of 100-5% by weight with one or more copolymerizable unsaturated monomers in an amount of 0 to 95% by weight is excellent in transparency, moisture resistance, and heat resistance and is suitable as a material for optical elements.Type: GrantFiled: October 23, 1984Date of Patent: May 27, 1986Assignee: Hitachi Chemical Company, Ltd.Inventors: Hiromasa Kawai, Takashi Morinaga, Hiromu Miyajima, Toshio Akima, Mitsuharu Kato, Yutaka Hosoi
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Patent number: 4351910Abstract: An expandable styrene series resin composition comprising a styrene series resin containing in its molecular structure a group of the formula:--SiY.sub.n R.sub.3-n (I)wherein R is an inert monovalent organic group; Y is a hydrolyzable group; and n is an integer of 1 to 3, and a blowing agent, and if necessary, one or more organosilane compounds having at least two hydrolyzable groups in its molecule, can give foamed articles having excellent heat resistance as well as high degree of expansion and good physical and chemical properties.Type: GrantFiled: July 29, 1981Date of Patent: September 28, 1982Assignee: Hitachi Chemical Company, Ltd.Inventors: Hatuo Sugitani, Takeo Kudo, Yoshiyuki Mukoyama, Hiromasa Kawai
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Patent number: RE34061Abstract: A polymer obtained by polymerizing tricyclo[5.2.1.0.sup.2,6 ]deca-8-yl acrylate or methacrylate in an amount of 100-5% by weight with one or more copolymerizable unsaturated monomers in an amount of 0 to 95% by weight is excellent in transparency, moisture resistance, and heat resistance and is suitable as a material for optical elements.Type: GrantFiled: May 27, 1988Date of Patent: September 8, 1992Assignee: Hitachi Chemical Co., Ltd.Inventors: Hiromasa Kawai, Takashi Morinaga, Hiromu Miyajima, Toshio Akima, Mitsuharu Kato, Yutaka Hosoi