Patents by Inventor Junpei Sugihara

Junpei Sugihara 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).

  • Silicone rubber-covered copier roll
    Patent number: 4830893
    Abstract: The silicone rubber obtained by curing in the presence of a platinum-containing catalyst a composition comprising an organopolysiloxane containing a plurality of lower alkenyl radicals and a organohydrogensiloxane consisting essentially of R.sub.3 SiO.sub.1/2 units, R.sub.2 SiO units, RHSiO units, and RSiO.sub.3/2 units in a specified molar ratio is uniquely suitable as the coating material for the press roll in the fixing assembly of an electrophotographic copier.
    Type: Grant
    Filed: January 20, 1988
    Date of Patent: May 16, 1989
    Assignee: Toray Silicone Co., Ltd.
    Inventors: Akito Nakamura, Junpei Sugihara
  • Method for purifying alkoxysilane
    Patent number: 4697027
    Abstract: A method for purifying alkoxysilane with the general formula, R.sub.m Si(OR.sup.1).sub.4-m. The method significantly lowers the level of non-hydrolyzable chlorine-based impurities, as well as the level of hydrolyzable chlorine-based impurities. The method comprises: (i) heating the alkoxysilane in the presence of a treating agent selected from a group which consists of acid clays and metal halides; (ii) contacting the alkoxysilane with a neutralization agent; and (iii) separating the alkoxysilane from the unused neutralization agent and by-products of neutralization.
    Type: Grant
    Filed: October 27, 1986
    Date of Patent: September 29, 1987
    Assignee: Toray Silicon Co., Ltd.
    Inventors: Junpei Sugihara, Takeshi Imai, Shuzo Toida, Ikuzo Takahashi
  • Silicone rubber-covered copier roll
    Patent number: RE34027
    Abstract: The silicone rubber obtained by curing in the presence of a platinum-containing catalyst a composition comprising an organopolysiloxane containing a plurality of lower alkenyl radicals and a organohydrogensiloxane consisting essentially of R.sub.3 SiO.sub.1/2 units, R.sub.2 SiO units, RHSiO units, and RSiO.sub.3/2 units in a specified molar ratio is uniquely suitable as the coating material for the press roll in the fixing assembly of an electrophotographic copier.
    Type: Grant
    Filed: October 1, 1990
    Date of Patent: August 11, 1992
    Assignee: Toray Silicone Company, Ltd.
    Inventors: Akito Nakamura, Junpei Sugihara