Patents by Inventor Masahi Hara

Masahi Hara 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).

  • Cationic dyeable polyurethane elastic yarn and method of production
    Patent number: 8597787
    Abstract: Disclosed is a polyurethane elastic yarn which is excellent in elongation, resilience, heat resistance, alkali resistance, chemical resistance, and capability of being dyed with a cationic dye and which is suitable for use in a stretch cloth, a wearing apparel or the like. The polyurethane elastic yarn comprises: an elastic yarn comprising a polyurethane mainly composed of a polymer diol and a diisocyanate; and a polymer of a compound having a sulfonate group contained in the elastic yarn.
    Type: Grant
    Filed: December 13, 2007
    Date of Patent: December 3, 2013
    Assignee: INVISTA North America S.à.r.l.
    Inventors: Toshihiro Tanaka, Hirokuni Inoue, Masahi Hara, Tatsuaki Kanbayashi
  • CATIONIC DYEABLE POLYURETHANE ELASTIC YARN AND METHOD OF PRODUCTION
    Publication number: 20100130083
    Abstract: Disclosed is a polyurethane elastic yarn which is excellent in elongation, resilience, heat resistance, alkali resistance, chemical resistance, and capability of being dyed with a cationic dye and which is suitable for use in a stretch cloth, a wearing apparel or the like. The polyurethane elastic yarn comprises: an elastic yarn comprising a polyurethane mainly composed of a polymer diol and a diisocyanate; and a polymer of a compound having a sulfonate group contained in the elastic yarn.
    Type: Application
    Filed: December 13, 2007
    Publication date: May 27, 2010
    Applicant: INVISTA North America S.a.r.l.
    Inventors: Toshihiro Tanaka, Hirokuni Inque, Masahi Hara, Tatsuaki Kanbayashi
  • Polyurethane fiber containing poly(vinylidene fluoride)
    Patent number: 6376071
    Abstract: The present invention relates to polyurethane based fiber containing 0.1-25 percent poly(vinylidene fluoride) and a method of making the same.
    Type: Grant
    Filed: February 20, 2001
    Date of Patent: April 23, 2002
    Assignee: DuPont-Toray Co. Ltd.
    Inventors: Toshihiro Tanaka, Masahi Hara, Masao Umezawa