The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 17, 1984
Filed:
Dec. 30, 1982
Applicant:
Inventors:
Paul L Gendler, San Jose, CA (US);
Robert Twieg, San Jose, CA (US);
Assignee:
International Business Machines Corporation, Armonk, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41M / ; G01D / ;
U.S. Cl.
CPC ...
204-2 ; 3461351 ; 427145 ;
Abstract
A printing medium which includes a substrate coated with a compound of the formula: ##STR1## wherein R.sub.3 is a ring group having certain substituents in at least one ortho position with respect to the atom connected to C.dbd.O; and each R.sub.1 and R.sub.2 individually is aryl or alkaryl or are interconnected to form with the nitrogen atom a phenothiazine, phenoxazine, or phenazine or substituted derivative; and coated with an oxidizing agent or reduced form thereof; and method of use.