Patents by Inventor Etsuko Tobita

Etsuko Tobita 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).

  • Fluorocarbon polymers and processes for their preparation
    Patent number: 4661231
    Abstract: A fluorocarbon polymer comprising a perfluorocarbon main chain and a pendant chain attached to the main chain, characterized in that the pendant chain has a quaternary ammonium type terminal group.
    Type: Grant
    Filed: October 30, 1985
    Date of Patent: April 28, 1987
    Assignees: Toyo Soda Manufacturing Co., Ltd., Sagami Chemical Research Center
    Inventors: Kiyohide Matsui, Yoshiyuki Kikuchi, Tamejiro Hiyama, Etsuko Tobita, Kiyoshi Kondo
  • Fluorocarbon anion exchangers and processes for their preparation
    Patent number: 4659744
    Abstract: A fluorocarbon anion exchanger which is composed of a fluorocarbon polymer comprising a perfluorocarbon main chain and a pendant chain attached to the main chain, characterized in that the pendant chainhas a terminal group represented by the formula: ##STR1##
    Type: Grant
    Filed: June 25, 1984
    Date of Patent: April 21, 1987
    Assignees: Toyo Soda Manufacturing Co., Ltd., Sagami Chemical Research Center
    Inventors: Kiyohide Matsui, Yoshiyuki Kikuchi, Tamejiro Hiyama, Etsuko Tobita, Kiyosi Kondo, Akira Akimoto, Toru Seita, Hiroyuki Watanabe
  • Fluorocarbon polymers and processes for their preparation
    Patent number: 4567206
    Abstract: A fluorocarbon polymer comprising a perfluorocarbon main chain and a pendant chain attached to the main chain, characterized in that the pendant chain has a quaternary ammonium type terminal group.
    Type: Grant
    Filed: December 28, 1983
    Date of Patent: January 28, 1986
    Assignees: Toyo Soda Manufacturing Co., Ltd., Sagami Chemical Research Center
    Inventors: Kiyohide Matsui, Yoshiyuki Kikuchi, Tamejiro Hiyama, Etsuko Tobita, Kiyoshi Kondo, Akira Akimoto, Toru Seita, Hiroyuki Watanabe