Patents by Inventor Yoshitaka Udagawa

Yoshitaka Udagawa 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).

  • Process for recovering materials from rubber molded articles and materials recovered
    Publication number: 20030092783
    Abstract: This invention provides a process for recovering materials from a rubber molded article containing carbon black and rubber comprising the steps of
    Type: Application
    Filed: July 26, 2002
    Publication date: May 15, 2003
    Inventors: Yoshitaka Udagawa, Shinji Kawakami, Toshio Fukuda, Susumu Ashizawa
  • METHODS OF SEPARATING VULCANIZED OR UNVULCANIZED RUBBER AND SEPARATING RUBBER COMPOSITE, RUBBER COMPOSITION CONTAINING RECOVERED RUBBER OR RECOVERED CARBON BLACK, AND PROCESS FOR PRODUCING CARBON BLACK
    Patent number: 6525105
    Abstract: A method of separating a vulcanized or unvulcanized rubber into a rubber ingredient and a filler ingredient such as carbon black which comprises liquefying the vulcanized or unvulcanized rubber at ordinary temperature and ordinary pressure; and a method of separating from a rubber composite a component other than those. The methods comprise immersing, optionally with stirring, a rubber composite or a vulcanized rubber composition each in the form of a block in an organic solvent containing 0.01 to 50% peroxide such as benzoyl peroxide to liquefy the vulcanized rubber composition in the solvent and separating the filler ingredient and other components by centrifugal separation, membrane separation, or decantation.
    Type: Grant
    Filed: January 5, 2001
    Date of Patent: February 25, 2003
    Assignee: The Yokohama Rubber Co., Ltd.
    Inventors: Yoshitaka Udagawa, Susumu Ashizawa
  • Method of recovering L-quebrachitol from rubber latex serums
    Patent number: 5041689
    Abstract: Purified L-quebrachitol is recovered in increased quantities from rubber latex by dissolving concentrated solutions or pulverized solids of the serums in methyl alcohol under specified extraction conditions.
    Type: Grant
    Filed: June 28, 1989
    Date of Patent: August 20, 1991
    Assignees: The Yokohama Rubber Co., Ltd., The Board of the Rubber Research Institute of Malaysia
    Inventors: Yoshitaka Udagawa, Morihisa Machida, Seiichiro Ogawa
  • Process of making plated wire for reinforcing rubber goods
    Patent number: 4304113
    Abstract: An improved wire with an excellent adhesion with rubber is disclosed for reinforcing rubber goods, made by a diffusion process wherein oxides formed on the surface of plated metal during diffusion are removed before drawing.
    Type: Grant
    Filed: September 7, 1979
    Date of Patent: December 8, 1981
    Assignees: Kawasaki Steel Corporation, Kawatetsu Wire Products Company Ltd., The Yokohama Rubber Company Ltd.
    Inventors: Masamitsu Takei, Kunihiko Kataoka, Yoshitaka Udagawa, Shunichi Harada, Kozo Tsunoyama