Patents by Inventor Takehira Kaneko

Takehira Kaneko 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).

  • Thermal transfer sheet
    Patent number: 5686184
    Abstract: A thermal transfer sheet is provided which comprises: a foundation; a recording agent layer provided on one side of the foundation; and a back layer provided on the other side of the foundation and containing a binder resin and a charge-transfer complex; wherein the charge-transfer complex comprises an electrically conductive organic polymer serving as an electron donor and an electron acceptor; and wherein the back layer has a surface resistivity of not greater than 10.sup.11 .OMEGA./cm.sup.2.
    Type: Grant
    Filed: March 14, 1996
    Date of Patent: November 11, 1997
    Assignee: Fujicopian Co., Ltd.
    Inventors: Yoshimoto Akamatu, Shigeki Kusuba, Toshiyuki Yamane, Masumi Miyagi, Takehira Kaneko, Masashi Kamiyama
  • Method for the preparation of conductive polymer film
    Patent number: 5306443
    Abstract: By the selective use of a homogeneous stable precursor solution in which no polymerization reactions immediately occur and which contains aromatic compounds such as pyrrole, thiophene, aromatic amines or their derivatives, oxidizing agents, and solvents, as a precursor solution of conductive polymer film, a homogeneous and tough conductive polymer film can be obtained when the said precursor solution is cast on a substrate and the solvents are evaporated to remove.
    Type: Grant
    Filed: September 26, 1990
    Date of Patent: April 26, 1994
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Takehira Kaneko, Hirofumi Suzuki, Nobuo Matsui, Tomio Yagihara, Shiro Higashida, Akira Nakada, Hitoshi Matsumoto, Takeo Shimizu
  • Pyrrole monomer
    Patent number: 5278295
    Abstract: A pyrrole polymer membrane having electrical conductivity and liquid crystal properties in the same matrix. The starting pyrrole monomer derivative is illustrated by the formula ##STR1## where R.sub.1 and R.sub.2 are selected so that at least either of them is an electron attractive group. Methods of producing such membranes by a electropolymerization process and by a chemical oxidation process are described.
    Type: Grant
    Filed: May 7, 1992
    Date of Patent: January 11, 1994
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Hirofumi Suzuki, Takehira Kaneko, Nobuo Matsui, Isami Hamamoto, Tetsuya Katoh, Toshiaki Satoh, Fuminiko Nagasaki
  • Polymers of 3,4-substituted pyrrole compounds and their preparation method
    Patent number: 4816536
    Abstract: Polymers of a 3,4-substituted pyrrole compound substituted by an electron-attractive group having a Hammett's substituent constant (.sigma..sub.p) of 0.30 to 0.80 in at least one of the 3- and 4- positions are disclosed. The polymers are stable in the air in a dope-free state and show distinct electrochromism. Some of them are soluble in an alkaline aqueous solvent. Therefore, they are useful as electrochromic elements, etc.
    Type: Grant
    Filed: April 27, 1987
    Date of Patent: March 28, 1989
    Assignee: Nippon Soda Co., Ltd.
    Inventors: Takeo Shimizu, Takehira Kaneko, Tomoyuki Inoue, Hiroshi Takahashi