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. 04, 1977
Filed:
Feb. 16, 1973
Rolf Kyburz, Marly, CH;
Ciba-Geigy AG, Basel, CH;
Abstract
The present invention relates to a process for crosslinking hydrophilic colloids which contain amino-, imino- and/or hydroxyl groups. Compounds of the formula ##EQU1## are used as crosslinking agents. In the formula V and W denote hydrogen atoms or organic radicals, X and Y represent vinyl groups or substituted vinyl groups or groups which can be converted into vinyl groups, Z represents an organic bridge member and m is an integer from one to 11. The compounds used as cross-linking agents, except those of the above formula wherein X and Y represent groups which can be converted into vinyl groups, are new and form part of the invention; also forming another aspect of the invention are photographic materials containing celloids cross-linked as per the above process.