Hardening photographic layers containing silver halide with a 1-sulphonyl-4-amino-pyridinium salt
Patent 4067741 Issued on January 10, 1978. Estimated Expiration Date: 
January 10, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
January 10, 1995. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent References 2816125 2950197 2964404 3839042 3880665 InventorsAssigneeApplicationNo. 05/733759 filed on 10/19/1976US Classes:430/621, Hardening ingredient containing106/150.1, With nonproteinaceous hetero ring compound427/338, Proteinaceous coating430/566, Developing or fixing agents containing for liquid processing527/201, With ethylenically unsaturated reactant530/354, Gelatin530/408Sulfur containing reactantExaminersPrimary: Louie, Won H. Jr.Attorney, Agent or FirmForeign Application Priority Data1975-10-24 DTAbstract1-Sulphonyl-4-amino-pyridinium salts are used as quick acting hardeners for protein-containing layers, in particular gelatine layers, for photographic purposes. |
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