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:
Mar. 29, 1977
Filed:
Jul. 06, 1973
Applicant:
Inventors:
John Douglas Ballantine, Ilford, EN;
Norman Alfred Smith, Ilford, EN;
Assignee:
Ilford Limited, Ilford, EN;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09H / ;
U.S. Cl.
CPC ...
260117 ; 96111 ; 106125 ;
Abstract
The present invention relates to the production of hardened gelatin layers by means of quaternary carbamoyl pyridinium compounds. Preferably this method is used for the hardening of silver halide photographic material.
Ballantine, John. (1977). Production of hardened gelatin layers by the addition of quaternary (U.S. Patent No. 4014862). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4014862
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile