Patents by Inventor Naoto Ohsuga

Naoto Ohsuga 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).

  • Chitosan-containing acrylic fibers and process for preparing the same
    Patent number: 6551705
    Abstract: The present invention is directed to chitosan-containing acrylic fibers having a total chitosan content of 0.05 to 2% by weight and an extractable chitosan content of not less than 0.03% by weight to less than the total chitosan content. The antimicrobial activity of the chitosan-containing acrylic fibers of the present invention can persist for a long period of time and is not deteriorated even when subjected to posttreatments, such as dyeing and bleaching of fibers, and treatments in usual service environments of fiber products, such as washing and ironing.
    Type: Grant
    Filed: March 17, 1999
    Date of Patent: April 22, 2003
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hiroaki Ohnishi, Yoshihiro Nishihara, Hiroshi Hosokawa, Seizo Oishi, Masako Iwamoto, Yasuyuki Fujii, Hajime Itoh, Naoto Ohsuga, Gary J. Capone, Charles W. Emerson
  • Process of making chitosan-containing acrylic fibers
    Patent number: 6524508
    Abstract: The present invention is directed to chitosan-containing acrylic fibers having a total chitosan content of 0.05 to 2% by weight and an extractable chitosan content of not less than 0.03% by weight to less than the total chitosan content. The antimicrobial activity of the chitosan-containing acrylic fibers of the present invention can persist for a long period of time and is not deteriorated even when subjected to posttreatments, such as dyeing and bleaching of fibers, and treatments in usual service environments of fiber products, such as washing and ironing.
    Type: Grant
    Filed: June 27, 2000
    Date of Patent: February 25, 2003
    Assignees: Mitsubishi Rayon Co., Ltd., Solutia Inc.
    Inventors: Hiroaki Ohnishi, Yoshihiro Nishihara, Hiroshi Hosokawa, Seizo Oishi, Masako Iwamoto, Yasuyuki Fujii, Hajime Itoh, Naoto Ohsuga, Gary J. Capone, Charles W. Emerson
  • Dental composition and process for producing dental polymeric shaped articles
    Patent number: 5296513
    Abstract: Disclosed is a process for producing dental polymeric shaped articles resistant to the adhesion of plaque which comprises the steps of shaping and curing a dental composition containing a monomer having at least one (meth)acryloyloxy group, and bringing the cured product into contact with a halogen or a halogen compound. Also disclosed is a dental composition comprising a monomer having at least one (meth)acryloyloxy group and a polymerization initiator, which is characterized by having added thereto at least one of a halogen and a halogen compound. When cured, this dental composition produces dental polymeric shaped articles resistant to the adhesion of plaque.
    Type: Grant
    Filed: July 20, 1992
    Date of Patent: March 22, 1994
    Assignee: Mitsubishi Rayon Co., Ltd.
    Inventors: Hitoshi Ige, Nobuhiro Mukai, Naoto Ohsuga