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:
Jan. 18, 2000
Filed:
May. 22, 1998
Applicant:
Inventors:
Mark Robert Fisher, Appleton, WI (US);
John Charles DeBraal, Kaukauna, WI (US);
Guido Steffan, Odenthal, DE;
Peter P Wenzl, Cologne, DE;
Assignee:
Bayer Aktiengesellschaft, Leverkusen, DE;
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B41M / ;
U.S. Cl.
CPC ...
503209 ; 503200 ; 503208 ; 503216 ; 503225 ; 503226 ;
Abstract
The present invention discloses a novel thermally-responsive record material having coated thereon a thermally sensitive color forming composition comprising a chromogenic material, an acidic developer material and a carbamate of the formula ##STR1## wherein R is selected from alkyl, aryl or aralkyl. The alkyl moiety in each of the preceding is selected to be of from one to eight carbons. The novel record material displays enhanced image intensity or improved thermal response.