Patents by Inventor Yoshitaka Yamashita

Yoshitaka Yamashita 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).

  • Patent number: 7402150
    Abstract: Disclosed is an injection device for properly dissolving pharmaceutical agents contained in a two-compartment syringe having slidable front and rear walls, and then performing portionwise multiple injections. The injection device comprises a front casing designed to enclose and hold the two-compartment syringe with a double-ended needle attached to the front end of it, a rear casing designed to receive the thus held two-compartment syringe being inserted in the rear-end first manner, and to lock and hold the front casing, a piston rod placed in the rear casing and designed to push from behind and carry forward the slidable rear wall, wherein the piston rod can be pushed forwardly from behind the rear casing, and a spring provided so that, when the front end of the piston rod is moved backward, the spring may be once compressed and then push the piston rod to a forward position again, and forwardly drives the slidable rear wall to abut on the slidable front wall.
    Type: Grant
    Filed: September 5, 2006
    Date of Patent: July 22, 2008
    Assignee: JCR Pharmaceuticals Co., Ltd.
    Inventors: Hiroshi Matsumoto, Masahiro Urakami, Noriyuki Tanaka, Yoshitaka Yamashita, Shinji Kotani, Takashi Hanada, Masafumi Tatsumi
  • Publication number: 20070185440
    Abstract: Disclosed is an injection device for properly dissolving pharmaceutical agents contained in a two-compartment syringe having slidable front and rear walls, and then performing portionwise multiple injections. The injection device comprises a front casing designed to enclose and hold the two-compartment syringe with a double-ended needle attached to the front end of it, a rear casing designed to receive the thus held two-compartment syringe being inserted in the rear-end first manner, and to lock and hold the front casing, a piston rod placed in the rear casing and designed to push from behind and carry forward the slidable rear wall, wherein the piston rod can be pushed forwardly from behind the rear casing, and a spring provided so that, when the front end of the piston rod is moved backward, the spring may be once compressed and then push the piston rod to a forward position again, and forwardly drives the slidable rear wall to abut on the slidable front wall.
    Type: Application
    Filed: September 5, 2006
    Publication date: August 9, 2007
    Inventors: Hiroshi Matsumto, Masahiro Urakami, Noriyuki Tanaka, Yoshitaka Yamashita, Shinji Kotani, Takashi Hanada, Masafumi Tatsumi
  • Patent number: 6004786
    Abstract: A carrier for immobilizing lipase is prepared by bonding a silane coupling agent having a carboxylic-ester group to an inorganic carrier. Preferred silane coupling agents are .gamma.-methacryl oxypropyltrimethoxy silane, .gamma.-acetoxypropyltrimethoxy silane or .gamma.-acryloxypropyltrimethoxy silane. The inorganic carrier can be kaolinite, porous glass, bentonite, silica gel, alumina, silica, silica-alumina hydroxy apatite or calcium phosphate gel. Lipase is immobilized by mixing lipase with the inorganic carrier containing the bound silane coupling agent, filtering the resultant mixture and drying the filtered mixture. Functional groups of the lipase are bonded to the carboxylic-ester group of the silane coupling agent.
    Type: Grant
    Filed: April 24, 1997
    Date of Patent: December 21, 1999
    Assignee: Toyo Denka Kogyo Co., Ltd.
    Inventors: Yoshitaka Yamashita, Masanobu Kamori, Hideo Takenaka, Joji Takahashi
  • Patent number: 5756415
    Abstract: A method of preparing an enzyme immobilizing carrier includes the steps of providing a material consisting of kaolin mineral. The material is subject to acid treatment with a strong acid having a pH of 4 or less, and hydrothermal treatment at a temperature of from about 100.degree. C. to about 250.degree. C. The material is dried, thereby producing a porous powder. The porous powder is baked at a temperature of from about 350.degree. C. to about 1000.degree. C., for thereby producing the carrier.
    Type: Grant
    Filed: June 6, 1995
    Date of Patent: May 26, 1998
    Assignee: Toyo Denka Kogyo Co., Ltd.
    Inventors: Joji Takahashi, Eiji Kanazawa, Yoshitaka Yamashita, Tomio Kashiwai, Hideo Takenaka
  • Patent number: 5614401
    Abstract: An enzyme immobilizing carrier is formed from a porous powder. The powder uses kaolin mineral as a starting material, which starting material is subjected to acid treatment by a strong acid. The acid treated kaolin mineral is then subjected to a hydrothermal treatment. The acid and hydrothermal treated kaolin mineral is then subjected to a baking treatment.
    Type: Grant
    Filed: June 21, 1994
    Date of Patent: March 25, 1997
    Assignee: Toyo Denka Kogyo Co., Ltd.
    Inventors: Joji Takahashi, Eiji Kanazawa, Yoshitaka Yamashita, Tomio Kashiwai, Hideo Takenaka