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:
Apr. 12, 1983
Filed:
Dec. 22, 1980
Applicant:
Inventors:
Robert D Lowrey, Saint Paul, MN (US);
Howard D Nelson, River Falls, WI (US);
George Van Dyke Tiers, Saint Paul, MN (US);
Assignee:
Minnesota Mining and Manufacturing Company, Saint Paul, MN (US);
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; B41M / ; B41M / ;
U.S. Cl.
CPC ...
430338 ; 430332 ; 430336 ; 430337 ; 430340 ; 430341 ; 430342 ; 430343 ; 430351 ; 430346 ; 430495 ; 428913 ; 428411 ; 428481 ; 428537 ; 2503171 ; 106 145 ;
Abstract
A thermographic imaging system comprising a single layer and capable of providing a stable dark to black image upon localized heating is disclosed. The single layer comprises a polymeric binder, a combination of at least two leuco dyes, and a nitrate salt.