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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.:

US 4756998 B1

PDFFull Text
Date of Patent:
Jul. 12, 1988

Filed:

Oct. 03, 1986

Polymeric couplers and light-sensitive photographic silver halide

Applicant:
Inventors:

Gunter Helling, Odenthal, DE;

Friedrich-Wilhelm Kunitz, Leverkusen, DE;

Hans Langen, Bonn, DE;

Assignee:

Agfa Gevaert Aktiengesellschaft, Leverkusen, DE;

Attorney:

Connolly and Hutz

Primary Examiner:

Paul R Michl

Assistant Examiner:

Lee C Wright

Int. Cl.
CPC ...
G03C / ; G03C / ; G03C / ;
U.S. Cl.
CPC ...
430548 ; 430627 ; 430630 ;
Abstract

Polymeric couplers with recurring units which contain at least one urethane and/or urea group, are suitable for the production of improved photographic recording materials.

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Helling, Gunter. (1988). Polymeric couplers and light-sensitive photographic silver halide (U.S. Patent No. 4756998). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4756998

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