Patents by Inventor Eiji Mathubara

Eiji Mathubara 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).

  • Deleting agents for printing plates and method for deletion
    Patent number: 4443531
    Abstract: Disclosed are a deletion fluid for offset printing plates which contains an S-triazine compound represented by the following general formula: ##STR1## (wherein R.sub.1 and R.sub.2 represent --SH or --OH and when either one of R.sub.1 or R.sub.2 is --SH, the other may be NHR wherein R is H or --R'---COOH wherein R' is an alkylene group or arylene group) and a method for deletion of undesired portion of images formed on an offset printing plate with said deletion fluid.
    Type: Grant
    Filed: September 27, 1982
    Date of Patent: April 17, 1984
    Assignee: Mitsubishi Paper Mills, Ltd.
    Inventors: Shoji Yamada, Eiji Kanada, Eiji Mathubara