Patents by Inventor Yasuaki Yokoyama

Yasuaki Yokoyama 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).

  • Silicon film forming process
    Publication number: 20020034585
    Abstract: A process capable of forming a silicon film on a substrate efficiently, for example, at a high yield and a high forming rate with simple operation and device unlike CVD and plasma CVD.
    Type: Application
    Filed: September 10, 2001
    Publication date: March 21, 2002
    Applicant: JSR CORPORATION
    Inventors: Yasuo Matsuki, Yasuaki Yokoyama, Yasumasa Takeuchi, Masahiro Furusawa, Ichio Yudasaka, Satoru Miyashita, Tatsuya Shimoda
  • Epoxy group-containing copolymer and radiation sensitive resin compositions thereof
    Patent number: 5530036
    Abstract: An epoxy group-containing thermosetting resin composition comprising (A) a copolymer obtained From (a) at least one member selected from an unsaturated carboxylic acid and an unsaturated carboxylic acid anhydride, (b) an epoxy group-containing unsaturated compound, (c) a monoolefin unsaturated compound, and optionally (d) a conjugated diolefin unsaturated compound, and (B) an organic solvent for dissolving the above copolymer. There is also provided another epoxy-group containing thermosetting resin composition which contains the above component (A), (C) a polymerizable compound having at least one ethylenically unsaturated double bond, and (D) a photopolymerization initiator. These epoxy-group containing thermosetting resin compositions are excellent in storage stability.
    Type: Grant
    Filed: December 15, 1994
    Date of Patent: June 25, 1996
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Kimiyasu Sano, Masayuki Endo, Atsufumi Shimada, Yasuaki Yokoyama, Nobuo Bessho
  • Epoxy group-containing resin compositions
    Patent number: 5399604
    Abstract: An epoxy group-containing thermosetting resin composition comprising (A) a copolymer obtained from (a) at least one member selected from an unsaturated carboxylic acid and an unsaturated carboxylic acid anhydride, (b) an epoxy group-containing unsaturated compound, (c) a monoolefin unsaturated compound, and optionally (d) a conjugated diolefin unsaturated compound, and (B) an organic solvent for dissolving the above copolymer. There is also provided another epoxy-group containing thermosetting resin composition which contains the above component (A), (C) a polymerizable compound having at least one ethylenically unsaturated double bond, and (D) a photopolymerization initiator. These epoxy-group containing thermosetting resin compositions are excellent in storage stability.
    Type: Grant
    Filed: July 21, 1993
    Date of Patent: March 21, 1995
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Kimiyasu Sano, Masayuki Endo, Atsufumi Shimada, Yasuaki Yokoyama, Nobuo Bessho
  • Pigment-dispersed color-filter composition comprising an alkali-soluble block copolymer as a binder
    Patent number: 5368976
    Abstract: The present invention provides a pigment dispersed color-filter composition containing a binder polymer such as an alkali-soluble block copolymer; a radiation-sensitive compound; and a pigment. The pigment-dispersed color-filter composition which further contains an organic medium, or an organic medium and a carboxylic acid is also provided.
    Type: Grant
    Filed: March 24, 1993
    Date of Patent: November 29, 1994
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Yusuke Tajima, Nobuo Bessho, Fumitake Takinishi, Yasuaki Yokoyama, Hideaki Masuko
  • Material for forming coating film
    Patent number: 5364910
    Abstract: A material for forming a coating film which comprises a compound having at least one glycidyl group in the molecule, a compound having a substituent capable of reacting with the glycidyl group, and a compound having a heterocyclic structure containing secondary nitrogen atom and/or tertiary nitrogen atom. The material is excellent in transparency and flatness and has high solvent resistance, particularly high alkaline resistance and imparts high hardness to a coating to a coating film formed therefrom.
    Type: Grant
    Filed: December 29, 1992
    Date of Patent: November 15, 1994
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Fumitaka Takinishi, Makiko Togo, Masayuki Endo, Yasuaki Yokoyama
  • Radiation-sensitive resin composition comprising an epoxy-containing alkali-soluble resin and a naphthoquinone diazide sulfonic acid ester
    Patent number: 5362597
    Abstract: A radiation-sensitive resin composition comprising:(a) an epoxy group-containing alkali-soluble resin, or a combination of an alkali-soluble resin which may have an epoxy group and an epoxy compound,(b) 1,2-naphthoquinonediazide sulfonic acid ester, and(c) a solvent.The above radiation-sensitive resin composition is useful as a material for forming a lens.
    Type: Grant
    Filed: May 27, 1992
    Date of Patent: November 8, 1994
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Kimiyasu Sano, Osahiko Tomomitsu, Masayuki Endoh, Yasuaki Yokoyama
  • Liquid crystal aligning agent and aligning agent-applied liquid crystal display device
    Patent number: 5276132
    Abstract: A liquid crystal aligning agent containing a polymer selected from the group consisting of a polyamic acid having a steroidal skeleton and an imidized product thereof; and a liquid crystal display device to which the liquid crystal aligning agent is applied.
    Type: Grant
    Filed: March 4, 1992
    Date of Patent: January 4, 1994
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Michinori Nishikawa, Tsuyoshi Miyamoto, Yasuaki Yokoyama, Yasuo Matsuki
  • Epoxidized polyether and process for producing the same
    Patent number: 4474944
    Abstract: An epoxidized polyether, characterized by containing oxytetramethylene units and having in one molecule 0.9 or more epoxy groups on the average represented by the general formula (I): ##STR1## wherein R.sub.1 and R.sub.2, which may be the same or different, are hydrogen atoms or alkyl groups. An epoxy resin obtained from said epoxidized polyether alone or in admixture with an ordinary epoxy compound has a high flexibility.
    Type: Grant
    Filed: April 7, 1983
    Date of Patent: October 2, 1984
    Assignee: Japan Synthetic Rubber Co., Ltd.
    Inventors: Kenji Yasuda, Yasuaki Yokoyama, Shuichi Matsumoto, Kunihiro Harada
  • Pigment-dispersed color-filter composition comprising an alkali-soluble block copolymer as a binder
    Patent number: RE37033
    Abstract: The present invention provides a pigment dispersed color-filter composition containing a binder polymer such as an alkali-soluble block copolymer; a radiation-sensitive compound; and a pigment. The pigment-dispersed color-filter composition which further contains an organic medium, or an organic medium and a carboxylic acid is also provided.
    Type: Grant
    Filed: January 3, 1997
    Date of Patent: January 30, 2001
    Assignee: JSR Corporation
    Inventors: Yusuke Tajima, Nobuo Bessho, Fumitaka Takinishi, Hideaki Masuko, Yasuaki Yokoyama