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:
Apr. 20, 1982
Filed:
Feb. 11, 1981
Applicant:
Inventors:
Rolf Steiger, Praroman, CH;
Jean-Francois Reber, Marly, CH;
Assignee:
Ciba Geigy AG, Basel, CH;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430427 ; 430401 ; 430428 ; 430430 ; 430434 ; 430606 ; 430578 ;
Abstract
Photographic negative material which has at least one layer which contains a desensitized silver halide emulsion, the desensitizer used being a trinuclear heptamethinecyanine or a halogenated trinuclear tetramethinecyanine which has three identical heterocyclic ring systems, which can have different substituents and are linked to one another by three identical methine systems, which can be mesomeric, is suitable for processing in subdued daylight but nevertheless has an adequate sensitivity on exposure to intense light.