Patents by Inventor Kenichi Kitahara

Kenichi Kitahara 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).

  • Patent number: 4609617
    Abstract: A support for photographic use comprising a polyester film with at least one surface having a layer provided by coating with an aqueous coating composition, the coating composition comprising a copolymer containing (a) from about 0.01% to about 70% by weight glycidyl acrylate or glycidyl methacrylate with an expoxy-ring-opening ratio of the glycidyl group to the whole amount of epoxy rings of from 5 to 35 mole %; and (b) a monomer polymerizable with the glycidyl group selected from the group consisting of alkylacrylic acid ester, an alkylmethacrylic acid ester, an acrylamide, an N-alkylacrylamide, vinyl chloride, vinylidene chloride, styrene, a styrene derivative, a vinyl ether, a vinyl ester, a diolefin or a combination thereof.
    Type: Grant
    Filed: October 24, 1983
    Date of Patent: September 2, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toshiaki Yamazaki, Takanori Nakadate, Kenichi Kitahara, Morio Kobayashi, Noboru Fujimori, Ryuji Shimosaki
  • Patent number: 4571379
    Abstract: Photographic support having coated over a polyester support as a subbing layer a specific aqueous copolymer composition, said subbing layer being formed by coating aqueous composition containing copolymer substantially composed of a specific combination of three or four monomer components. Said photographic support has firm adhesive property, good flatness and other advantages.
    Type: Grant
    Filed: February 13, 1985
    Date of Patent: February 18, 1986
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Toshiaki Yamazaki, Takanori Nakadate, Kenichi Kitahara, Noboru Fujimori, Morio Kobayashi, Ryuji Shimosaki
  • Patent number: 4328283
    Abstract: A photographic polyester support having an adjacent subbing layer which comprises a copolymer of (1) glycidyl acrylate and/or glycidyl methacrylate and (2) hydroxylalkyl acrylate with the alkyl groups of 2-4 carbon atoms and/or hydroxyalkyl methacrylate wherein 0-67 wt % of a copolymerizable vinyl monomer may be present and the method of subbing said support with an aqueous composition of the acrylate copolymer.
    Type: Grant
    Filed: November 13, 1979
    Date of Patent: May 4, 1982
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Takanori Nakadate, Naoto Abe, Kenichi Kitahara, Hironobu Nakao
  • Patent number: 4192683
    Abstract: A photographic light-sensitive material comprising a layer which contains a compound represented by the following Formula I ##STR1## wherein R.sub.1 is an alkyl group having 1 to 18 carbon atoms, R.sub.2 is a hydrogen atom or an alkyl group having 1 to 18 carbon atoms with a proviso that when R.sub.2 is a hydrogen atom, R.sub.1 is an alkyl group having 1 to 7 carbon atoms, M is a cation and n is a number of 1 to 50.
    Type: Grant
    Filed: October 18, 1977
    Date of Patent: March 11, 1980
    Assignee: Konishiroku Photo Industry Co., Ltd.
    Inventors: Eiichi Sakamoto, Masao Ishihara, Kazuo Nakazato, Hiroshi Yamada, Sadatugu Terada, Kenichi Kitahara, Naoto Abe, Mamoru Komiya, Masaru Kanbe