Patents by Inventor Chiyoji Watanabe

Chiyoji Watanabe 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).

  • Photosensitive compound and photosensitive composition
    Patent number: 6908719
    Abstract: The present invention relates to a water-soluble photosensitive compound represented by the general formula (1): or by the general formula (2): in the formula, X represents a direct bond, an alkylene group containing 1 to 5 carbon atoms, —CH2O—, —OCH2—, —CH2OCH2—, —O—, —S— or —SO2—, and Z represents —SO3?.Q+, —COO?.Q+ or —SO2NR2, in which Q+ represents Li+, Na+, K+ or N+R4 and R represents a hydrogen atom and/or an alkyl group containing 1 to 5 carbon atoms, said alkyl group optionally having one hydroxy, ether, carbonyl, carbonyloxy or oxycarbonyl group, wherein a photosensitive group has an absorption maximum wavelength of not longer than 305 nm in the ultraviolet absorption spectrum thereof.
    Type: Grant
    Filed: March 31, 2000
    Date of Patent: June 21, 2005
    Assignees: Sanyo Chemical Industries, Ltd., Sony Corporation
    Inventors: Tetsuya Watanabe, Takao Mukai, Yasunori Niwa, Keiko Noda, Chiyoji Watanabe