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. 11, 1997
Filed:
Nov. 13, 1995
Robert J Ross, Rochester, NY (US);
Pranab Bagchi, Webster, NY (US);
Richard W Connelly, Rochester, NY (US);
Eastman Kodak Company, Rochester, NY (US);
Abstract
This invention describes gelatin thickening compounds for photographic coating melts with the general structure: ##STR1## wherein: A is an aromatic or heteroaromatic group; X is SO.sub.3 M or CO.sub.2 M M is H or an alkali metal, ammonium or pyridinium ion; each R1 and R2 is independently an alkyl or substituted alkyl group, each alkyl group being straight or branched chain and having 1 to 30 carbon atoms; each R3 and R4 is independently H or an alkyl or substituted alkyl group, each alkyl group being straight or branched chain and having 1 to 30 carbon atoms; each of a, b, c and e is independently 0, 1, 2 or 3, with the proviso that a+b+c+e is at least 1; and d is 1, 2, or 3; with the further proviso that when A is phenyl, X is SO.sub.3 M, d is 1 and any one of a, c, or e is 1, the sum of a+b+c+e is at least 2; and wherein there is a substantial absence of a compound containing one or more --SO.sub.2.sup.- groups in the composition.