Patents by Inventor Shunya Shinohara

Shunya Shinohara 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 of producing high-quality polyethylenepolyamines
    Patent number: 5861537
    Abstract: The invention provides a method of industrially producing high-quality polyethylenepolyamines, which exerts high decolorizing effect and is economical, comprising the steps that hydrogen halide is added to a mixture of polyethylenepolyamines and heated, then distillation is performed to fractionate components each having a boiling point not higher than that of triethylenetetramine, next alkali metal hydroxide is added to that residual liquor after distillation to neutralize, and distillation is performed again to fractionate components each having a boiling point not lower than that of tetraethylenepentamine.
    Type: Grant
    Filed: August 4, 1997
    Date of Patent: January 19, 1999
    Assignees: Tosoh Corporation, Delamine bv
    Inventors: Shunya Shinohara, Sadakatsu Kumoi
  • Magnetic recording medium comprising a specific type of copolymer binder
    Patent number: 4689269
    Abstract: A magnetic recording medium comprising a non-magnetic support, and a magnetic recording layer formed on the support. The layer is made of a composition which comprises magnetic powder dispersed in a resin binder comprising a thermosetting resin and a copolymer of maleic anhydride and an olefinically unsaturated monomer. The monomer is selected from alkyl esters of acrylic and methacrylic acids, alkenes, vinyl chloride, styrene and mixtures thereof.
    Type: Grant
    Filed: April 12, 1985
    Date of Patent: August 25, 1987
    Assignee: Victor Company of Japan, Ltd.
    Inventors: Yasuo Mukai, Yosuke Takasawa, Masanobu Shimizu, Shunya Shinohara