Patents by Inventor Seijin Shindoh

Seijin Shindoh 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).

  • Toner for electrophotography
    Patent number: 5061589
    Abstract: A toner for electrophotography containing a compound represented by the following formula (1) ##STR1## wherein R represents an alkyl group, --A-- represents --O--COCH.dbd.CH-- or --S--CH.sub.2 CH.sub.2 -- and L is an integer of 2 to 10.The toner for electrophotography has a sharp distribution for the charging amount, excellent moisture resistance and stability to aging. As a result, the toner can provide an image of extremely high gradation and shows satisfactory performance of replicate image formation.
    Type: Grant
    Filed: April 3, 1990
    Date of Patent: October 29, 1991
    Assignee: Nippon Kayaku Kabushiki Kaisha
    Inventors: Seijin Shindoh, Michiko Torigoe