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:
Feb. 05, 1980
Filed:
May. 05, 1978
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 ...
B01J / ;
U.S. Cl.
CPC ...
252316 ; 260335 ; 282 275 ; 427151 ; 427152 ; 428307 ; 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. (1980). Micro-capsules containing ureido fluoran chromogenic compounds (U.S. Patent No. 4187193). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4187193
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile