Patents by Inventor Koya Kojima

Koya Kojima 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: 20170209345
    Abstract: An object of the present invention is to provide a dental material, particularly, a dental prosthesis, having excellent properties such as hydrophilicity and antifouling properties. The dental prosthesis according to the present invention includes a monolayer film obtained by curing a composition including: a compound (I) having at least one hydrophilic group selected from anionic hydrophilic groups and cationic hydrophilic groups, and at least one functional group with a polymerizable carbon-carbon double bond; a compound (II) having two or more functional groups with a polymerizable carbon-carbon double bond (wherein the compound (II) has no anionic hydrophilic group nor cationic hydrophilic group); and a surfactant (III) having a hydrophilic moiety including an anionic hydrophilic group, a cationic hydrophilic group or two or more hydroxyl groups, and a hydrophobic moiety composed of an organic residue (wherein the surfactant has no polymerizable carbon-carbon double bond).
    Type: Application
    Filed: July 8, 2015
    Publication date: July 27, 2017
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Akira HASEGAWA, Yasufumi TSUCHIYA, Koya KOJIMA, Koju OKAZAKI, Yohsuke ASANO, Kenichi FUJII, Takaaki HAYASHI
  • Patent number: 9482787
    Abstract: The polymerizable composition of the present invention contains a ketone compound including one or more carbonyl groups, at least one kind of isocyanate compounds and at least one kind of thiol compounds.
    Type: Grant
    Filed: June 19, 2012
    Date of Patent: November 1, 2016
    Assignee: MITSUI CHEMICALS, INC.
    Inventors: Nobuo Kawato, Toshiya Hashimoto, Koya Kojima
  • Publication number: 20140107314
    Abstract: The polymerizable composition of the present invention contains a ketone compound including one or more carbonyl groups, at least one kind of isocyanate compounds and at least one kind of thiol compounds.
    Type: Application
    Filed: June 19, 2012
    Publication date: April 17, 2014
    Applicant: MITSUI CHEMICALS, INC.
    Inventors: Nobuo Kawato, Toshiya Hashimoto, Koya Kojima