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:
Sep. 26, 1978
Filed:
May. 07, 1976
Applicant:
Inventors:
Kenneth D Glanz, Appleton, WI (US);
David B McQuain, Dayton, OH (US);
Assignee:
NCR Corporation, Dayton, OH (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C09B / ; C07D / ;
U.S. Cl.
CPC ...
2603 / ;
Abstract
Thermal sensitive indigo compounds are disclosed. A thermal sensitive sheet material is disclosed utilizing dehydroindigo di(alkyl acylates) as a color producing component. The material can be a copy medium and it can be transparent or non-transparent. The indigo compounds are substantially colorless dehydroindigo di(alkyl acylates) colorable by thermal exposure.