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:
Jan. 22, 1980
Filed:
Apr. 03, 1978
Applicant:
Inventors:
Thaddeus W Tomaszewski, Dearborn, MI (US);
Hans-Gerhard Creutz, deceased, late of Yale, MI (US);
Richard J Clauss, Allen Park, MI (US);
Assignee:
Oxy Metal Industries Corporation, Warren, MI (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 51 ; 204 / ;
Abstract
An aqueous acid trivalent chromium electroplating solution and process for forming chromium platings employing a bath containing trivalent chromium, formate ions as a complexing agent, and a bath soluble reducing agent selected from the group consisting of formaldehyde, glyoxal, formaldehye bisulfite, glyoxal di-bisulfite, sodium formaldehyde sulfoxylate, and mixtures thereof. The bath may additionally and preferably contain controlled amounts of conductivity salts, ammonium cations and a buffering agent to maintain the pH within the desired range.