Patents by Inventor Haruo Shigeno

Haruo Shigeno 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).

  • Phosphate ester treated para-type aromatic polyamide short fibers
    Patent number: 7799239
    Abstract: Para-type aromatic polyamide short fibers are attached with a phosphate ester alkali metal salt of an alcohol having a carbon number of 12 having a molar fraction of a monoester salt of from 45 to 70% by mol and a molar fraction of a diester salt of from 10 to 40% by mol in an amount of from 0.05 to 1.0% by weight based on the weight of the fibers, whereby such para-type aromatic polyamide short fibers excellent in spinning property are obtained that are excellent in bundling property and antistatic property, and are low in adhesion property causing less twining on rollers and less formation of scums.
    Type: Grant
    Filed: October 27, 2005
    Date of Patent: September 21, 2010
    Assignee: Teijin Techno Products Limited
    Inventors: Haruo Shigeno, Shouji Makino, Tomohiro Okuya
  • Para-Type Aromatic Polyamide Short Fibers
    Publication number: 20080045691
    Abstract: Para-type aromatic polyamide short fibers are attached with a phosphate ester alkali metal salt of an alcohol having a carbon number of 12 having a molar fraction of a monoester salt of from 45 to 70% by mol and a molar fraction of a diester salt of from 10 to 40% by mol in an amount of from 0.05 to 1.0% by weight based on the weight of the fibers, whereby such para-type aromatic polyamide short fibers excellent in spinning property are obtained that are excellent in bundling property and antistatic property, and are low in adhesion property causing less twining on rollers and less formation of scums.
    Type: Application
    Filed: October 27, 2005
    Publication date: February 21, 2008
    Applicant: TEIJIN TECHNO PRODUCTS LIMITED
    Inventors: Haruo Shigeno, Shouji Makino, Tomohiro Okuya