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:
May. 31, 1977
Filed:
Feb. 21, 1975
Applicant:
Inventors:
Willy Joseph Vanassche, Kontich, BE;
Robert Joseph Pollet, Vremde, BE;
Jozef Frans Willems, Wilrijk, BE;
Antoon Leon Vandenberghe, Hove, BE;
Jules Robert Berendsen, Deurne, BE;
Herman Alberik Pattyn, Kapellen, BE;
Assignee:
AGFA-GEVAERT, N.V., Mortsel, BE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ; G03C / ;
U.S. Cl.
CPC ...
96 95 ; 96 64 ;
Abstract
Direct-positive emulsions are described comprising incorporated developing agents wherein the developing agents are 1,4-dihydroxybenzene compounds of which at least one of the hydroxyl groups has been esterified to form a hydrolyzable aliphatic acyloxy group comprising a quaternary ammonium group.