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:
Jun. 15, 1976
Filed:
Dec. 27, 1972
Applicant:
Inventors:
Nigel Hughes, Manchester, EN;
Andrew Hunter Renfrew, Manchester, EN;
Assignee:
Wiggins Teape Limited, London, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B41C / ; B41M / ;
U.S. Cl.
CPC ...
428326 ; 260335 ; 282 275 ; 428487 ; 428488 ;
Abstract
A coated transfer sheet for pressure-sensitive copying systems which comprises an organic colorless color former containing two or more potential chromophoric systems each of which is capable of being activated substantially immediately when the compound is brought into contact with one or more activating substances.