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:
Feb. 01, 1983
Filed:
Dec. 30, 1980
Applicant:
Inventors:
James R Bartels-Keith, Lexington, MA (US);
Eva R Karger, Arlington, MA (US);
Assignee:
Polaroid Corporation, Cambridge, MA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ;
U.S. Cl.
CPC ...
430218 ; 430239 ; 430249 ; 430380 ; 430390 ; 430405 ; 430442 ; 430484 ; 430543 ; 430559 ; 430566 ;
Abstract
This invention relates to amino hydroxy cyclohexenones of the formula ##STR1## wherein R.sub.1, R.sub.2, R.sub.3 and R.sub.4 each are alkyl, usually containing 1 to 20 carbon atoms. In another embodiment, the present invention is directed to the use of the above-denoted compounds as photographic silver halide developing agents and to photographic processes, products and compositions employing the same.