Patents by Inventor Yoshitaka Anazawa

Yoshitaka Anazawa 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).

  • Polyarylene sulfide, a process for the preparation thereof and a composition comprising the same
    Patent number: 5789533
    Abstract: A polyarylene sulfide in which a ratio of terminal --SX groups to a total of the terminal --SX groups and --SZn-- groups is less than 20 mole %, wherein X represents an alkali metal or a hydrogen atom, and which has a melt viscosity, V.sub.6 of 100 to 2,000 poises.Also disclosed are a composition comprising 100 parts of the above polyarylene sulfide, 0.01 to 20 parts of zeolite and 0.01 to 20 part of silica, and a process for the preparation of the above polyarylene sulfide.
    Type: Grant
    Filed: June 27, 1996
    Date of Patent: August 4, 1998
    Assignee: Tonen Chemical Corporation
    Inventors: Hidenori Yamanaka, Osamu Komiyama, Masaru Miyoshi, Yoshitaka Anazawa, Naohiro Mikawa, Kazuhiro Ichikawa