Patents by Inventor Tomokazu Iyoda

Tomokazu Iyoda 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).

  • Thiophene derivative having long conjugated chain at 3-position, and photo-responsive material imploying the same
    Patent number: 5247098
    Abstract: Thiophene derivatives represented by the general formula (I): ##STR1## where R is an aldehyde, carboxyl, C.sub.1-5 -alkyl ester or C.sub.1-5 -alkyl acetal group and n is 3 to 5, are prepared. These compounds are reversibly converted to their respective isomers by light irradiation, accompanied with a large shift of absorption and emission bands, thus suitable for a photo-responsive material.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: September 21, 1993
    Assignee: Canon Kabushiki Kaisha
    Inventors: Hiroaki Kumagai, Tomokazu Iyoda, Takeo Shimizu