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. 17, 1999
Filed:
Sep. 24, 1993
Mark P Kirk, Savona, IT;
David B Oliff, Bishop's Stortford, GB;
Minnesota Mining and Manufacturing Company, St. Paul, MN (US);
Abstract
A photothermographic material having a photosensitive medium comprising: photosensitive silver halide, a reducible silver source, a reducing agent for silver ion, a hydrobromic acid salt of a nitrogen-containing heterocyclic ring or fused ring nucleus associated with a pair of bromine atoms CHARACTERIZED IN THAT the photosensitive medium additionally comprises as an antifoggant, substantially in the absence of an antifoggant effective amount of mercury and other heavy metal salts, a tribromomethyl ketone compound of general formula (I): ##STR1## in which; R represents an alkyl group, an aryl group, a carbocyclic ring or fused ring nucleus or a heterocyclic ring or fused ring nucleus.