Patents by Inventor Keishi TSUKAMOTO

Keishi TSUKAMOTO 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).

  • Material for intraocular lens
    Patent number: 11578158
    Abstract: The present invention provides a material for intraocular lens which has improved hydrolysis resistance. The material for intraocular lens according to the present invention is obtained by polymerizing a monomer composition comprising: a base monomer, a hydrophilic monomer, and a cross-likable monomer, wherein the base monomer comprises an aromatic ring-containing acrylate monomer and an alkoxyalkyl methacrylate monomer having an alkoxyalkyl group having four or less carbon atoms. A blending ratio on a molar basis of the methacrylate monomer with respect to the acrylate monomer in all the monomer components contained in the monomer composition is 0.25 to 1.00.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: February 14, 2023
    Assignee: MENICON CO., LTD.
    Inventors: Yuya Suganuma, Hiroko Nomura, Tatsuya Ojio, Keishi Tsukamoto
  • MATERIAL FOR INTRAOCULAR LENS
    Publication number: 20210061933
    Abstract: The present invention provides a material for intraocular lens which has improved hydrolysis resistance. The material for intraocular lens according to the present invention is obtained by polymerizing a monomer composition comprising: a base monomer, a hydrophilic monomer, and a cross-likable monomer, wherein the base monomer comprises an aromatic ring-containing acrylate monomer and an alkoxyalkyl methacrylate monomer having an alkoxyalkyl group having four or less carbon atoms. A blending ratio on a molar basis of the methacrylate monomer with respect to the acrylate monomer in all the monomer components contained in the monomer composition is 0.25 to 1.00.
    Type: Application
    Filed: January 31, 2018
    Publication date: March 4, 2021
    Applicant: MENICON CO., LTD.
    Inventors: Yuya SUGANUMA, Hiroko NOMURA, Tatsuya OJIO, Keishi TSUKAMOTO
  • Intraocular lens
    Patent number: 10716875
    Abstract: An intraocular lens includes a polymeric lens material formed from a polymerizable composition. The polymerizable composition includes: (a) a single aromatic acrylate monomer which is an aromatic-ring containing acrylate; (b) an alkoxyalkyl methacrylate monomer having an alkoxyalkyl group with 4 or less carbon atoms; (c) an alkyl acrylate monomer having an alkyl group with 1 to 20 carbon atoms; (d) a hydrophilic monomer; and (e) a crosslinkable monomer.
    Type: Grant
    Filed: January 31, 2018
    Date of Patent: July 21, 2020
    Assignee: MENICON CO., LTD
    Inventors: Yuya Suganuma, Hiroko Nomura, Tatsuya Ojio, Keishi Tsukamoto
  • INTRAOCULAR LENS
    Publication number: 20200038548
    Abstract: An intraocular lens includes a polymeric lens material formed from a polymerizable composition. The polymerizable composition includes: (a) a single aromatic acrylate monomer which is an aromatic-ring containing acrylate; (b) an alkoxyalkyl methacrylate monomer having an alkoxyalkyl group with 4 or less carbon atoms; (c) an alkyl acrylate monomer having an alkyl group with 1 to 20 carbon atoms; (d) a hydrophilic monomer; and (e) a crosslinkable monomer.
    Type: Application
    Filed: January 31, 2018
    Publication date: February 6, 2020
    Applicant: MENICON CO., LTD.
    Inventors: Yuya SUGANUMA, Hiroko NOMURA, Tatsuya OJIO, Keishi TSUKAMOTO