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:
Jun. 07, 1977
Filed:
Apr. 26, 1976
Hidefumi Sera, Minami-ashigara, JA;
Kameji Nagao, Minami-ashigara, JA;
Tsumoru Ishii, Minami-ashigara, JA;
Fujii Photo Film Co., Ltd., Minami-ashigara, JA;
Abstract
A method of hardening gelatin which comprises adding thereto a compound of the following general formula (I): ##STR1## in which Y.sub.1 is CH.sub.2 =CH--, ClCH.sub.2 --CH.sub.2 --, BrCH.sub.2 --CH.sub.2 --, CH.sub.3 COO--CH.sub.2 CH.sub.2 -- or ClCH.sub.2 COO--CH.sub.2 CH.sub.2 --, R.sub.1 and R.sub.2 are H or CH.sub.3, but both of them are not CH.sub.3 at the same time, and A is one of the following groups: ##STR2## in which both R.sub.3 and R.sub.4 were acyl groups or at least one of them is an acyl group other than when R.sub.3 and R.sub.4 form a benzotriazole ring, and when one of R.sub.3 and R.sub.4 is an acyl group, the other is H or an alkyl group containing at most 4 carbon atoms; and wherein in any case, R.sub.3 and R.sub.4 may form a saturated or unsaturated carbocyclic or heterocyclic ring in combination with the nitrogen atom to which they are attached; R.sub.5, R.sub.6 and R.sub.7 are alkyl groups containing at most 4 carbon atoms, and may form a saturated or unsaturated ring, or may form a bicyclo ring; X.sup.- is an acid anion; R.sub.8 and R.sub.9 are a saturated or unsaturated carbocyclic or heterocyclic ring which combine with the nitrogen atom to which they are attached; R.sub.10 is an alkyl or aryl group containing at most 6 carbon atoms; R.sub.11 is an alkyl group containing at most 3 carbon atoms; R.sub.12 is an alkyl, aryl or aralkyl group containing at most 7 carbons atoms; Y.sub.2 is CH.sub.2 =CH--, ClCH.sub.2 --CH.sub.2 --, Br--CH.sub.2 CH.sub.2 --, CH.sub.3 COO--CH.sub.2 CH.sub.2 --, or ClCH.sub.2 COO--CH.sub.2 CH.sub.2 --, and Y.sub.1 is as earlier defined.