Method for electroplating bright zinc
Patent 3974045 Issued on August 10, 1976. Estimated Expiration Date: 
August 10, 1993. 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.
August 10, 1993. 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 3655534 3803008 3838026 3853718 3869358 3915815 InventorsAssigneeApplicationNo. 526950 filed on 11/25/1974US Classes:205/312, Nitrogen-heterocyclic compound-containing205/307, Nitrogen-heterocyclic compound-containing524/901, ELECTRODEPOSITABLE COMPOSITIONS528/405With reactant which is devoid of a heterocyclic ring containing oxygen, selenium or tellurium atoms as ring membersExaminersPrimary: Kaplan, G. L.Attorney, Agent or FirmAbstractA brightener additive for zinc electroplating baths, which comprises: a water-soluble polymer prepared by the reaction of an epihalohydrin with a nitrogen heterocyclic compound such as the compounds of imidazole, pyrrole, cyclic amine of the formula: ##EQU1## and piperazine in the presence of a nitrogen compound such as the compounds of aliphatic amines, hexamethylenetetramine and ammonia. |
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