Patents by Inventor Taketatsu Sugiyama

Taketatsu Sugiyama 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).

  • Diazo type recording material utilizing microencapsulated diazo compound, a coupler and a hydroxyphenylsulfone derivative
    Patent number: 5328796
    Abstract: A diazo type recording material, which has a substantially unstained background, a superior preservability, and is capable of producing images of high density, wherein the diazo recording material comprises a support having thereon a recording layer comprising a photosensitive diazo compound, a hydroxyphenylsulfone derivative and a coupling component which forms a color by reacting with the diazo compound, with the diazo compound being enclosed in microcapsules.
    Type: Grant
    Filed: April 28, 1993
    Date of Patent: July 12, 1994
    Assignee: Fuji Photo Film Co., Ltd.
    Inventors: Akihiro Shimomura, Taketatsu Sugiyama, Makoto Ohno, Toshiharu Tanaka