Patents by Inventor Hiroshi Inukai

Hiroshi Inukai 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).

  • Patent number: 5284893
    Abstract: The invention provides a coating composition prepared by dissolving a fluorine-type copolymer in an organic solvent, the copolymer comprising:i) about 50 to about 90 mole % of a structural unit represented by the formula a)--CH.sub.2 --CF.sub.2 --ii) about 5 to about 30 mole % of a structural unit represented by the formula b)--CF.sub.2 --CF.sub.2 --andiii) about 5 to about 30 mole % of a structural unit represented by the formula c)--CF.sub.
    Type: Grant
    Filed: October 12, 1990
    Date of Patent: February 8, 1994
    Assignee: Daikin Industries, Ltd.
    Inventors: Motonobu Kubo, Hiroshi Inukai, Takahiro Kitahara
  • Patent number: 5229473
    Abstract: The present invention provides a fluorinecontaining copolymer comprising at least one fluoroolefin and at least one cyclic unsaturated compound represented by the formulas (I) and (II) ##STR1## wherein each of n and m is 0 or a positive integer and preferably 0 or an integer of from 1 to 3, l is an integer of 3 or more than 3 and preferably 3 or 4, and R.sup.1 to R.sup.10 are the same or different and each represents a hydrogen atom, a halogen atom, a hydrocarbon group or a substituted hydrocarbon group and a method of preparing the same; and a fluorine-containing copolymer comprising at least one fluoroolefin, at least one cyclic unsaturated compound selected from the compounds of the above formulas (I) and (II) and at least one of mono and diolefins and a method of preparing the same.
    Type: Grant
    Filed: August 7, 1992
    Date of Patent: July 20, 1993
    Assignee: Daikin Industries Ltd.
    Inventors: Motonobu Kobo, Hiroshi Inukai, Takahiro Kitahara, Kayoko Sugioka
  • Patent number: 5223366
    Abstract: The present invention provides a carrier comprising a core and a coating for developing electrostatic images, the core being formed from a specific polymer composition.
    Type: Grant
    Filed: March 11, 1992
    Date of Patent: June 29, 1993
    Assignee: Daikin Industries, Ltd.
    Inventors: Motonobu Kubo, Hiroshi Inukai, Takahiro Kitahara
  • Patent number: 5192635
    Abstract: This invention provides a fluorine-containing copolymer comprising:(a) 50 to 85 mole % of a structural unit represented by the formula--CH.sub.2 --CF.sub.2--,(b) 5 to 40 mole % of a structural unit represented by the formula--CF.sub.
    Type: Grant
    Filed: June 12, 1991
    Date of Patent: March 9, 1993
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroshi Inukai, Takahiro Kitahara, Kayoko Sugioka, Morio Mizuguchi
  • Patent number: 5177166
    Abstract: The present invention provides a fluorine-containing copolymer comprising at least one fluoroolefin and at least one cyclic unsaturated compound represented by the formulas (I) and (II) ##STR1## wherein each of n and m is 0 or a positive integer and preferably 0 or an integer of from 1 to 3, l is an integer of 3 or more than 3 and preferably 3 or 4, and R.sup.1 to R.sup.10 are the same or different and each represents a hydrogen atom, a halogen atom, a hydrocarbon group or a substituted hydrocarbon group and a method of preparing the same; and a fluorine-containing copolymer comprising at least one fluoroolefin, at least one cyclic unsaturated compound selected from the compounds of the above formulas (I) and (II) and at least one of mono and diolefins and a method of preparing the same.
    Type: Grant
    Filed: March 7, 1991
    Date of Patent: January 5, 1993
    Assignee: Daikin Industries Ltd.
    Inventors: Motonobu Kobo, Hiroshi Inukai, Takahiro Kitahara, Kayoko Sugioka
  • Patent number: 5171897
    Abstract: This invention provides (i) novel hexafluoroneopentyl alcohol, (ii) its derivatives, i.e., hexafluoroneopentyl (meth)acrylate, (iii) fluorinated polymers comprising said acrylate as the monomer component, and (iv) optical materials comprising said fluorinated polymers.
    Type: Grant
    Filed: March 10, 1992
    Date of Patent: December 15, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroshi Inukai, Takashi Yasuhara, Takahiro Kitahara
  • Patent number: 5149753
    Abstract: The invention provides: a fluorine-containing copolymer comprising methyl methacrylate and at least one long-chain fluoroalkyl methacrylate and having a light transmittance of about 90% or more; a method of preparing the copolymer; and an optical fiber using the copolymer as the cladding material.
    Type: Grant
    Filed: October 4, 1990
    Date of Patent: September 22, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroshi Inukai, Takahiro Kitahara
  • Patent number: 5145761
    Abstract: The present invention provides a carrier comprising a core and a coating for developing electrostatic images, the core being formed from a specific polymer composition.
    Type: Grant
    Filed: October 11, 1989
    Date of Patent: September 8, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Motonobu Kubo, Hiroshi Inukai, Takahiro Kitahara
  • Patent number: 5141834
    Abstract: Disclosed are a carrier for developing electrostatic images, the carrier comprising a core and a coating on the core, the coating being formed from a copolymer comprising about 50 to about 90 mole % of vinylidene fluoride, about 5 to about 45 mole % of tetrafluoroethylene and about 1 to about 30 mole % of a fluorine-containing unsaturated polymerizable compound; and a carrier for developing electrostatic images, the carrier comprising a core and a coating on the core, the coating being formed from a copolymer comprising about 50 to about 90 mole % of vinylidene fluoride and about 50 to about 10 mole % of at least one fluorine-containing unsaturated polymerizable compound selected from the group consisting of trifluorochloroethylene, 1,1-dihydrohexafluoroisobutene, hexafluoropropylene, perfluoro(alkyl vinyl ether), trifluoroethylene and hexafluoroacetone.
    Type: Grant
    Filed: September 21, 1989
    Date of Patent: August 25, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Motonobu Kubo, Hiroshi Inukai, Takahiro Kitahara
  • Patent number: 5128389
    Abstract: This invention provides: (1) a hard coating agent of low refractive index comprising an unsaturated double bond-containing ester compound having fluorine-containing organic group, an unsaturated double bond-containing compound having alkoxysilyl group and a photopolymerization initiator; and (2) a hard coating agent of low refractive index comprising a copolymer prepared by copolymerizing the unsaturated double bond-containing ester compound having fluorine-containing organic group and the unsaturated double bond-containing compound having alkoxysilyl group.
    Type: Grant
    Filed: September 25, 1990
    Date of Patent: July 7, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroshi Inukai, Takahiro Kitahara
  • Patent number: 5116544
    Abstract: This invention provides (i) novel hexafluoroneopentyl alcohol, (ii) its derivatives, i.e., hexafluoroneopentyl (meth)acrylate, (iii) fluorinated polymers comprising said acrylate as the monomer component, and (iv) optical materials comprising said fluorinated polymers.
    Type: Grant
    Filed: August 4, 1989
    Date of Patent: May 26, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroshi Inukai, Takashi Yasuhara, Takahiro Kitahara
  • Patent number: 5093889
    Abstract: The invention provides an optical fiber comprising a cladding and a core wherein the cladding comprises a terpolymer comprising:(1) about 50 to about 90 mol. % of vinylidene fluoride,(2) about 8 to about 45 mol. % of trifluoroethylene and(3) about 2 to about 15 mol. % of hexafluoropropylene or perfluoro(alkylvinylether).
    Type: Grant
    Filed: January 24, 1990
    Date of Patent: March 3, 1992
    Assignee: 501 Daikin Industries, Ltd.
    Inventors: Motonobu Kubo, Hiroshi Inukai, Takahiro Kitahara
  • Patent number: 5087679
    Abstract: Polymeric dielectrics, which comprise 60 to 79 % by mole of repeating units derived from vinylidene fluoride, 18 to 22 % by mole of repeating units derived from trifluoroethylene and 3 to 22 % by mole of repeating units derived from chlorotrifluoroethylene, have high dielectric constant.
    Type: Grant
    Filed: April 4, 1990
    Date of Patent: February 11, 1992
    Assignee: Daikin Industries Ltd.
    Inventors: Hiroshi Inukai, Noriko Kawai, Takahiro Kitahara, Shinichiro Kai, Motonobu Kubo
  • Patent number: 5081165
    Abstract: This provides an antifouling coating composition comprising a photopolymerization initiator or thermal polymerization initiator and a fluorine-containing (meth)acrylate represented by the formula (1) ##STR1## wherein X is hydrogen atom, fluorine atom, chlorine atom or methyl, Y is alkylene having 1 to 3 carbon atoms, a group --CH.sub.2 CH.sub.2 N(R)SO.sub.2 -- (wherein R is alkyl having 1 to 4 carbon atoms), a group --CH.sub.2 CH(OZ)CH.sub.2 -- (wherein Z is a hydrogen atom or acetyl) or a group ##STR2## and Rf is fluoroalkyl having 6 to 15 carbon atoms or fluoroalkyl having 5 to 21 carbon atoms and containing 1 to 5 oxygen atoms in the carbon ring provided that the oxygen atoms are not present adjacent to one another.
    Type: Grant
    Filed: April 14, 1989
    Date of Patent: January 14, 1992
    Assignee: Daikin Industries, Ltd.
    Inventors: Hiroshi Inukai, Takahiro Kitahara
  • Patent number: 5071725
    Abstract: This invention provides a carrier for developing electrostatic images comprising a core and a coating on the core, the coating being formed from a copolymer comprising a fluoroalkyl acrylate and a monomer copolymerizable therewith.
    Type: Grant
    Filed: December 14, 1990
    Date of Patent: December 10, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Motonobu Kubo, Hiroshi Inukai, Takahiro Kitahara
  • Patent number: 5069941
    Abstract: This invention provides an antifouling finishing agent comprising a fluorine-containing polymer comprising at least 50% by weight of a fluorine-containing acrylate represented by the formula ##STR1## wherein Y is alkylene group having 1 to 3 carbon atoms, a group of the formula --CH.sub.2 CH.sub.2 N(R)SO.sub.2 -- (wherein R is alkyl group having 1 to 4 carbon atoms) or a group of the formula --CH.sub.2 CH(OZ)CH.sub.2 -- (wherein Z is hydrogen atom or acetyl group), and R.sub.f is fluoroalkyl group having 3 to 21 carbon atoms or fluoralkyl group having 3 to 21 carbon atoms and containing 1 to 10 oxygen atoms in the carbon chain (provided that no oxygen atom is adjacent or closest to other oxygen atom), said fluoroalkyl groups having at least 5 fluorine atoms.
    Type: Grant
    Filed: February 7, 1991
    Date of Patent: December 3, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Akira Ohmori, Hiroshi Inukai, Takahiro Kitahara, Akihiko Ueda
  • Patent number: 5061184
    Abstract: In an adhesive composition for biomaterial use, a composition characterized by comprising as a main component a compound represented by the formula ##STR1## wherein A is H, F or CH.sub.3, B is fluoralkyl group having 1 to 20 carbon atoms.
    Type: Grant
    Filed: February 12, 1990
    Date of Patent: October 29, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Noboru Yamazaki, Shigeaki Kuratas, Toshiharu Yagi, Hiroshi Inukai
  • Patent number: 5021527
    Abstract: The present invention provides a fluorine-containing water- and oil-repellent composition comprising a fluorine-containing acrylate represented by the formula: ##STR1## wherein X is a fluorine atom or --CFX.sup.1 X.sup.2 group (wherein X.sup.1 and X.sup.2 are the same or different and are each a hydrogen atom or fluorine atom), Y is alkylene having 1 to 3 carbon atoms, --CH.sub.2 CH.sub.2 N(R)SO.sub.2 -- group (wherein R is alkyl having 1 to 4 carbon atoms) or --CH.sub.2 CH(OZ)CH.sub.2 -- (wherein Z is a hydrogen atom or acetyl), and Rf is fluoroalkyl having 3 to 21 carbon atoms, or fluoroalkyl having 3 to 21 carbon atoms and 1 to 10 oxygen atoms in its carbon chain (wherein no two oxygen atoms are present adjacent to each other).
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: June 4, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Akira Ohmori, Hiroshi Inukai
  • Patent number: 5021501
    Abstract: The present invention provides a fluorine-containing water- and oil-repellent composition comprising a fluorine-containing acrylate represented by the formula: ##STR1## wherein X is a fluorine atom or --CFX.sup.1 X.sup.2 group (wherein X.sup.1 and X.sup.2 are the same or different and are each a hydrogen atom or fluorine atom), Y is alkylene having 1 to 3 carbon atoms, --CH.sub.2 CH.sub.2 N(R)SO.sub.2 -- group (wherein R is alkyl having 1 to 4 carbon atoms) or --CH.sub.2 CH(OZ)CH.sub.2 -- (wherein Z is a hydrogen atom or acetyl), and Rf is fluoroalkyl having 3 to 21 carbon atoms, or fluoroalkyl having 3 to 21 carbon atoms and 1 to 10 oxygen atoms in its carbon chain (wherein no two oxygen atoms are present adjacent to each other).
    Type: Grant
    Filed: December 11, 1989
    Date of Patent: June 4, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Akira Ohmori, Hiroshi Inukai
  • Patent number: 5021316
    Abstract: This invention provides a carrier for developing electrostatic images comprising a core and a coating on the core, the coating being formed from a copolymer comprising a fluoralkyl acrylate and a monomer copolymerizable therewith.
    Type: Grant
    Filed: October 6, 1989
    Date of Patent: June 4, 1991
    Assignee: Daikin Industries, Ltd.
    Inventors: Motonobu Kubo, Hiroshi Inukai, Takahiro Kitahara