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:
Jul. 31, 1979
Filed:
Dec. 02, 1976
Akira Endo, Odawara, JP;
Tohru Kitahara, Odawara, JP;
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Abstract
A process of selectively separating a developing agent and/or a color development accelerator such as benzyl alcohol, etc., from photographic processing solutions containing these materials by bringing the processing solutions into contact with a copolymer selected from the group consisting of a styrenedivinylbenzene copolymer and a methacrylic acid monoestermethacrylic acid polyester copolymer. The developing agent thus adsorbed on the copolymer can be recovered therefrom by treating the copolymer with, e.g., diluted sulfuric acid.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile