Patents by Inventor Kazuhiko Fujisawa

Kazuhiko Fujisawa 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).

  • Publication number: 20080004401
    Abstract: In one aspect, the invention relates to compositions comprising siloxanyl compounds comprising the structure: or residues thereof. Such compositions can be suitable for producing molded articles, can be excellent in transparency, hydrophilicity, and oxygen permeability, and can have a low modulus of elasticity and/or an excellent optical quality, so as to be suitable for ophthalmic lenses such as contact lenses and intraocular lenses. This abstract is intended as a scanning tool for purposes of searching in the particular art and is not intended to be limiting of the present invention.
    Type: Application
    Filed: December 12, 2006
    Publication date: January 3, 2008
    Inventors: Masataka Nakamura, Kazuhiko Fujisawa, Mitsuru Yokota
  • Publication number: 20070191621
    Abstract: This invention provides a process for producing of a silicone compound which includes a synthesis reaction of a silicone compound represented by the following formulas (a) and/or (a?), by reacting a carboxylic acid represented by the following formula (a2) to an epoxy silane represented by the following formula (a1) in presence of a metal salt of the carboxylic acid represented by the general formula (a2), characterized in that the reaction is carried out in presence of 0.05 wt % or more water in said reaction system. Here, A denotes siloxanyl group. R1 denotes a substitutent with 1 to 20 carbons having a polymerizable group. R2 to R4 respectively and independently denote hydrogen, a substituted or unsubstituted substitutent with 1 to 20 carbons, or —X-A. X denotes a substituted or unsubstituted divalent substitutent with 1 to 20 carbons.
    Type: Application
    Filed: February 25, 2005
    Publication date: August 16, 2007
    Applicant: Toray Industries, Inc.
    Inventors: Kazuhiko Fujisawa, Tsutomu Goshima, Mitsuru Yokota
  • Patent number: 7112641
    Abstract: A monomer as represented by general formula (a) or (a?) below, with which a polymer having high oxygen permeability and transparency and suited to an ophthalmic lens is obtained, is provided. Suitable monomers include: wherein A is a siloxanyl group; R1 is H or a methyl group; R2 is a substituted group that is selected from the group consisting of alkyl groups with 1 to 20 carbon atoms that may be substituted, aryl groups with 6 to 20 carbon atoms that may be substituted and formula (c) below.
    Type: Grant
    Filed: March 13, 2002
    Date of Patent: September 26, 2006
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Kazuhiko Fujisawa, Naoki Shimoyama, Mitsuru Yokota
  • Patent number: 7071274
    Abstract: A monomer as represented by general formula (a) or (a?) below, with which a polymer having high oxygen permeability and transparency and suited to an ophthalmic lens is obtained, is provided. Suitable monomers have the formula: wherein A is a siloxanyl group; R1 and R2 are H or methyl groups; R3 is a substituted group that is selected from the group consisting of alkyl groups with 1 to 20 carbon atoms that may be substituted and aryl groups with 6 to 20 carbon atoms that may be substituted; m indicates an integer of 0 to 200.
    Type: Grant
    Filed: March 11, 2002
    Date of Patent: July 4, 2006
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Kazuhiko Fujisawa, Naoki Shimoyama, Mitsuru Yokota
  • Patent number: 6818719
    Abstract: Polymers of high oxygen permeability and a low modulus of elasticity and ophthalmic lenses and contact lenses using the same are provided. The polymers are characterized in that they are obtained by copolymerizing 5 to 90 parts by weight of a monomer (SiMAA) represented by the formula below, 5 to 90 parts by weight of 3-tris (trimethylsiloxy) silyl propyl methacrylate (TRIS), 5 to 70 parts by weight of N,N-dimethyl acrylamide (DMAA) and 0.1 to 3 parts by weight of monomer having two or more copolymerizable carbon-carbon unsaturated bonds in 1 molecule (provided that the total quantity of SiMAA, TRIS and DMAA is 100 parts by weight and that the total quantity of SiMAA and TRIS is 30 to 95 parts by weight), and which are used for ophthalmic lenses.
    Type: Grant
    Filed: April 11, 2003
    Date of Patent: November 16, 2004
    Assignee: Johnson & Johnson Vision Care, Inc.
    Inventors: Kazuhiko Fujisawa, Naoki Shimoyama, Mitsuru Yokota
  • Publication number: 20040201820
    Abstract: This invention provides an ophthalmic lens of high tensile elongation (i.e., that does not break easily).
    Type: Application
    Filed: February 25, 2004
    Publication date: October 14, 2004
    Inventors: Masataka Nakamura, Kazuhiko Fujisawa, Naoki Shimoyama, Mitsuru Yokota
  • Publication number: 20040122249
    Abstract: A monomer as represented by general formula (a) or (a′) below, with which a polymer having high oxygen permeability and transparency and suited to an ophthalmic lens is obtained, is provided.
    Type: Application
    Filed: September 19, 2003
    Publication date: June 24, 2004
    Inventors: Kazuhiko Fujisawa, Naoki Shimoyama, Mitsuru Yokota
  • Publication number: 20040106694
    Abstract: A monomer as represented by general formula (a) or (a′) below, with which a polymer having high oxygen permeability and transparency and suited to an ophthalmic lens is obtained, is provided.
    Type: Application
    Filed: September 29, 2003
    Publication date: June 3, 2004
    Inventors: Kazuhiko Fujisawa, Naoki Shimoyama, Mitsuru Yokota
  • Publication number: 20040014921
    Abstract: Polymers of high oxygen permeability and a low modulus of elasticity and ophthalmic lenses and contact lenses using the same are provided. The polymers are characterized in that they are obtained by copolymerizing 5 to 90 parts by weight of a monomer (SiMAA) represented by the formula below, 5 to 90 parts by weight of 3-tris (trimethylsiloxy) silyl propyl methacrylate (TRIS), 5 to 70 parts by weight of N,N-dimethyl acrylamide (DMAA) and 0.1 to 3 parts by weight of monomer having two or more copolymerizable carbon-carbon unsaturated bonds in 1 molecule (provided that the total quantity of SiMAA, TRIS and DMAA is 100 parts by weight and that the total quantity of SiMAA and TRIS is 30 to 95 parts by weight), and which are used for ophthalmic lenses.
    Type: Application
    Filed: April 11, 2003
    Publication date: January 22, 2004
    Inventors: Kazuhiko Fujisawa, Naoki Shimoyama, Mitsuru Yokota