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:
Sep. 04, 1984
Filed:
Mar. 14, 1983
Applicant:
Inventors:
Alan L Borror, Lexington, MA (US);
Ernest W Ellis, Carlisle, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C07D / ; C07D / ;
U.S. Cl.
CPC ...
549 21 ; 546 22 ; 546268 ; 548119 ; 548203 ; 548252 ; 549-5 ; 549 11 ;
Abstract
This invention relates to photographic products and processes employing silver halide solvent precursors of the formula ##STR1## wherein R.sup.1 is a monovalent organic radical; R.sup.2 is hydrogen or a monovalent organic radical; Z is a moiety that undergoes .beta.-elimination in aqueous alkaline solution and preferably is a moiety that undergoes .beta.-elimination in aqueous alkaline solution to release a photographically useful reagent; and n is an integer 3, 4 or 5.