Patents by Inventor Masatoshi Isono

Masatoshi Isono 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).

  • Thermoplastic elastomer composition
    Patent number: 5028662
    Abstract: A thermoplastic elastomer composition prepared by dynamically vulcanizing a composition comprised (A) polyolefin 5-50 wt. parts, (B) brominated butyl rubber 5-50 wt. parts, (C) polychloroprene rubber 5-50 wt. parts and (D) process oil 10-50 wt. parts in the presence of peroxide is disclosed.
    Type: Grant
    Filed: May 26, 1989
    Date of Patent: July 2, 1991
    Assignee: Advanced Elastomer Systems, L.P.
    Inventors: Eiji Sezaki, Masatoshi Isono, Masatoshi Akami, Hisafumi Endo
  • Process for producing polypropylene foam
    Patent number: 4766159
    Abstract: The invention relates to the process of the invention provides a radiation-crosslinked polypropylene foam by extrusion at a low temperature (about 170.degree. C.) below the decomposition point of the blowing agent. The resulting foamed item has by far better heat resistance than conventional ones.The raw resin can be prepared by mixing a resin in the pellet form and a blowing agent in the powder form on account of the low-temperature flowability. Heretofore, such mixing was impossible because the blowing agent does not disperse completely.This outstanding effect of the invention was not expected at all from the known prior arts.
    Type: Grant
    Filed: June 22, 1987
    Date of Patent: August 23, 1988
    Assignee: Tonen Sekiyukagaku K.K.
    Inventors: Sotoyuki Kitagawa, Takashi Nakayama, Masatoshi Isono