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:
Jan. 24, 1984
Filed:
Jul. 02, 1982
Applicant:
Inventors:
Katuji Kitatani, Minami-ashigara, JP;
Hidefumi Sera, Minami-ashigara, JP;
Atsuaki Arai, Minami-ashigara, JP;
Masasi Ogawa, Minami-ashigara, JP;
Kunio Ishigaki, Minami-ashigara, JP;
Haruo Ogura, Matsudo, JP;
Assignee:
Fuji Photo Film Co., Ltd., Kanagawa, JP;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G03C / ;
U.S. Cl.
CPC ...
430623 ; 430621 ;
Abstract
A method of hardening gelatin is described comprising treating gelatin with a compound of the formula (I) ##STR1## wherein R.sup.1 and R.sup.2 can each represent a monovalent group including a carbon atom or a nitrogen atom forming a bond together with the nitrogen atom N forming an acid ester in the formula (I); or R.sup.1 and R.sup.2 together can form a heterocyclic ring together with said nitrogen atom N, and