Patents by Inventor Hironobu Koyanagi

Hironobu Koyanagi 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).

  • Method for producing a liquid silicone rubber base
    Patent number: 4649005
    Abstract: Filled silicone rubber bases can be prepared without plasticizer by passing all of the filler together with from 30 to 100 percent of the total weight of the polyorganosiloxane ingredient of the base through the first kneading section of a compounding extruder and adding my remaining polyorganosiloxane before passing the composition through a second kneading section of the compounding extruder. The two kneading sections are maintained at temperatures of from 200.degree. to 300.degree. C.
    Type: Grant
    Filed: July 12, 1985
    Date of Patent: March 10, 1987
    Assignee: Toray Silicone Co., Ltd.
    Inventors: Masaru Kobayashi, Hironobu Koyanagi, Takahiro Sato