Patents by Inventor Yasuo Washigawa

Yasuo Washigawa 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).

  • Light-sensitive composition
    Patent number: 4298679
    Abstract: A light-sensitive composition comprising addition polymerizable ethylenically unsaturated double bond-containing compounds and a photopolymerization initiator comprising (1) at least one compound selected from the group consisting of benzanthrone, substituted benzanthrones (the substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms), 1,2-benzanthraquinone and substituted benzanthraquinones (substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms) and (2) at least one compound selected from the group consisting of 4,4'-di-substituted amino-benzophenones represented by the following general formula (a), p-substituted amino-benzaldehyde derivatives represented by the following general formula (b), 2-(p-substituted amino-phenyl)-1,3-dioxolanes represented by the following general formula (c), 4,4'-bis(substituted amino)-N-benzylideneanilines represented by the follow
    Type: Grant
    Filed: July 12, 1979
    Date of Patent: November 3, 1981
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Fumiaki Shinozaki, Yasuo Washigawa, Tomoaki Ikeda, Sho Nakao, Syunichi Kondoh
  • Light-sensitive photopolymerizable composition
    Patent number: 4175971
    Abstract: A light-sensitive composition comprising addition polymerizable ethylenically unsaturated double bond-containing compounds and a photopolymerization initiator comprising (1) at least one compound selected from the group consisting of benzanthrone, substituted benzanthrones (the substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms), 1,2-benzanthraquinone and substituted benzanthraquinones (substituents of which include halogen atoms, alkyl groups having 1 to 5 carbon atoms and alkoxy groups having 1 to 5 carbon atoms) and (2) at least one compound selected from the group consisting of 4,4'-di-substituted amino-benzophenones represented by the following general formula (a), p-substituted amino-benzaldehyde derivatives represented by the following general formula (b), 2-(p-substituted amino-phenyl)-1,3-dioxolanes represented by the following general formula (c), 4,4'-bis(substituted amino)-N-benzylideneanilines represented by the follow
    Type: Grant
    Filed: September 13, 1977
    Date of Patent: November 27, 1979
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Fumiaki Shinozaki, Yasuo Washigawa, Tomoaki Ikeda, Sho Nakao, Syunichi Kondoh