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:
May. 13, 1986
Filed:
Mar. 26, 1985
Hyman Chessin, Brick, NJ (US);
Kenneth R Newby, Berkeley Heights, NJ (US);
M&T Chemicals Inc., Woodbridge, NJ (US);
Abstract
A chromium plating bath and process for producing a non-iridescent, adherent, bright chromium deposit at high efficiencies and high temperatures under conditions such that the process is substantially free of cathodic low current density etching. The bath consists essentially of chromic acid and sulfate in predetermined concentrations, and an organic sulfonic acid or salts thereof, where the ratio of S to C is .gtoreq.1/3, e.g. methyl, ethyl and propyl sulfonic acid, and methane and 1,2-ethane disulfonic acid. The bath is substantially free of carboxylic acids, phosphonic acids, perfluoroloweralkyl sulfonic acids, and halides.