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:
Aug. 01, 1978
Filed:
Sep. 08, 1975
Applicant:
Inventors:
David N Vincent, San Diego, CA (US);
Cheng-Hsiung Chang, Naperville, IL (US);
Assignee:
Champion International Corporation, Stamford, CT (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B32B / ;
U.S. Cl.
CPC ...
428307 ; 252316 ; 260335 ; 282 275 ; 427151 ; 427152 ; 428327 ; 428914 ;
Abstract
A chromogenic compound having the structural formula ##STR1## wherein R.sup.1 and R.sup.2 each represent an alkyl group;
Vincent, David. (1978). Pressure-sensitive copy system including ureido fluoran chromogenic (U.S. Patent No. 4104437). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4104437
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile