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. 03, 1980
Filed:
Apr. 07, 1978
Hyman Chessin, Brick Township, Ocean County, NJ (US);
M&T Chemicals Inc., Woodbridge, NJ (US);
Abstract
A bright decorative plating process for electroplating chromium on a basis metal, characterized by high coverage and throwing power, utilizes a chromic acid plating bath containing the anion of an organic carboxylic acid or a halogenated organic carboxylic acid. The baths are of unprecedentedly high CrO.sub.3 to sulfate ratio, 600-3000:1. They may be of the self-regulating type. They contain a fluoride or complex fluoride as an auxiliary catalyst. The carboxylic acid anion may be added by introducing into the bath the acid itself, or a soluble salt of the acid, or the acid anhydride. The anions of the aliphatic dicarboxylic acids such as adipic acid and succinic acid anhydride are preferred. The concentration of the carboxylic acid anion is preferably from 0.5 to 32 grams per liter.