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:
Nov. 23, 1976
Filed:
May. 03, 1974
Applicant:
Inventors:
J Michael Grasshoff, Hudson, MA (US);
Lloyd D Taylor, Lexington, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ;
U.S. Cl.
CPC ...
2603 / ;
Abstract
Novel compounds are disclosed which release a photographic reagent in the presence of alkali and are therefore useful in photographic products and processes. The compounds may be defined as quinone- or naphthoquinonemethide precursors containing a mercapto-azole or azine photographic reagent moiety.