Patents by Inventor Yoshitaka Shiraishi

Yoshitaka Shiraishi 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: 20240082009
    Abstract: An artificial knee joint 1 includes: an insert member 2 embedded in a part of a joint surface of a medial condyle MC or lateral condyle LC of a tibia T; and a bridge member 3 disposed underneath the insert member 2, and having a length that allows both ends thereof to be anchored to a cortical bone of a tibia T.
    Type: Application
    Filed: October 8, 2020
    Publication date: March 14, 2024
    Inventors: Kazunori Hino, Hiromasa Miura, Kunihiko Watamori, Yoshitaka Shiraishi, Tomofumi Kinoshita
  • Patent number: 9522519
    Abstract: To provide a polycarbonate resin laminate having the surface hardness remarkably improved and being excellent in color and impact resistance.
    Type: Grant
    Filed: February 3, 2014
    Date of Patent: December 20, 2016
    Assignees: Mitsubishi Chemical Corporation, Mitsubishi Engineering-Plastics Corporation
    Inventors: Tatsuya Hitomi, Ryouhei Nishihara, Kiyotaka Hirano, Yoshitaka Shiraishi, Masanori Yamamoto, Tomonari Yokoyama, Masahide Shidou
  • Publication number: 20140147651
    Abstract: To provide a polycarbonate resin laminate having the surface hardness remarkably improved and being excellent in color and impact resistance.
    Type: Application
    Filed: February 3, 2014
    Publication date: May 29, 2014
    Applicants: MITSUBISHI ENGINEERING-PLASTICS CORPORATION, MITSUBISHI CHEMICAL CORPORATION
    Inventors: Tatsuya HITOMI, Ryouhei Nishihara, Kiyotaka Hirano, Yoshitaka Shiraishi, Masanori Yamamoto, Tomonari Yokoyama, Masahide Shidou
  • Publication number: 20110021739
    Abstract: The object of the present invention is to provide a polycarbonate resin having an extremely narrow molecular weight distribution, good flowability when melting, and particularly extremely good flowability when melting that does not depend on shear rate. The present invention relates to a polycarbonate resin, characterized in that a value obtained by dividing difference between a logarithmic value log MV9.12 of a melt viscosity (Pa·s) measured at shear rate of 9.12 sec?1 and a logarithmic value log MV1824 of a melt viscosity (Pa·s) measured at shear rate of 1824 sec?, with a capillary rheometer having a die diameter of 1 mm? and an effective length of 30 mmL, by a viscosity average molecular weight Mv calculated by the following equations, viscosity difference/molecular weight ratio, is 2.0×10?5 or less. ?sp/C=[?]×(1+0.28?sp) [?]=1.23×10?4×Mv0.83 (In the above equations, ?sp is a specific viscosity measured at 20° C.
    Type: Application
    Filed: April 18, 2007
    Publication date: January 27, 2011
    Applicant: Mitsubishi Chemical Corporation
    Inventors: Masaaki Miyamoto, Kenji Tsuruhara, Yoshitaka Shiraishi, Ryuuji Uchimura
  • Patent number: 6537627
    Abstract: A precision product container of the present invention comprises a resin composition as a base material, which comprises a polycarbonate resin and an epoxy compound. Such precision product container can remarkably prevent products contained therein from being contaminated by chlorine and is suitable as a container for a precision product which is free from operational errors of the precision product contained therein when this product is subsequently assembled or processed.
    Type: Grant
    Filed: May 28, 1999
    Date of Patent: March 25, 2003
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Sadao Kumai, Tsutomu Suzuki, Tatsuaki Hirohata, Takehito Ushiki, Masaaki Miyamoto, Hidemi Nakanishi, Yoshitaka Shiraishi
  • Publication number: 20020132073
    Abstract: A precision product container of the present invention comprises a resin composition as a base material, which comprises a polycarbonate resin and an epoxy compound. Such precision product container can remarkably prevent products contained therein from being contaminated by chlorine and is suitable as a container for a precision product which is free from operational errors of the precision product contained therein when this product is subsequently assembled or processed.
    Type: Application
    Filed: May 28, 1999
    Publication date: September 19, 2002
    Inventors: SADAO KUMAI, TSUTOMU SUZUKI, TATSUAKI HIROHATA, TAKEHITO USHIKI, MASAAKI MIYAMOTO, HIDEMI NAKANISHI, YOSHITAKA SHIRAISHI
  • Patent number: 6294641
    Abstract: A polycarbonate resin having an improved hue is provided, which is suitable for use as a substrate for transfer type optical recording media such as optical disks.
    Type: Grant
    Filed: September 20, 1999
    Date of Patent: September 25, 2001
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masaaki Miyamoto, Motonori Ueda, Kiyoji Kuma, Ryuji Uchimura, Yoshitaka Shiraishi
  • Patent number: 6288205
    Abstract: A polycarbonate resin having an improved hue is provided, which is suitable for use as a substrate for transfer type optical recording media such as optical disks.
    Type: Grant
    Filed: May 12, 2000
    Date of Patent: September 11, 2001
    Assignee: Mitsubishi Chemical Corporation
    Inventors: Masaaki Miyamoto, Motonori Ueda, Kiyoji Kuma, Ryuji Uchimura, Yoshitaka Shiraishi, Toshimitsu Inoue
  • Patent number: 4707512
    Abstract: Disclosed herein is a polyester composition comprising a polyester and a modified copolymer of ethylene and an .alpha.-olefin prepared by grafting (1) an ester of an .alpha.,.beta.-unsaturated carboxylic acid represented by the formula(I): ##STR1## wherein n is an integer of from 0 to 4; m is an integer of from 1 to 10; R.sup.1 and R.sup.2 respectively represent a hydrogen atom or an alkyl group and R.sup.3 represents a hydrogen atom, an alkyl group or a carboxyl group, or (2) said ester of an .alpha.,.beta.-unsaturated carboxylic acid represented by the formula (I) and n .alpha.,.beta.-unsaturated carboxylic acid or an anhydride thereof with a copolymer of ethylene and an .alpha.-olefin.
    Type: Grant
    Filed: July 11, 1985
    Date of Patent: November 17, 1987
    Assignee: Mitsubishi Chemical Industries Limited
    Inventors: Seiichiro Maruyama, Hironori Hayashida, Kazumasa Morita, Yoshitaka Shiraishi