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:
Sep. 12, 1989
Filed:
Aug. 03, 1988
Applicant:
Inventors:
Joseph G Sovran, Novi, MI (US);
Robert J Metz, Canton, MI (US);
Assignee:
M&T Chemicals Inc., Woodbridge, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ;
U.S. Cl.
CPC ...
204 51 ;
Abstract
A composition and method are disclosed for electroplating microporous chromium layers without the requirement that microparticles be present either in the chromium layer or in a sublayer. A composition used contains chromic acid and sulfoacetic acid and, optionally, dichromate ion, sulfate ion and/or fluoride ion but being substantially free of iodide, selenide or bromide ions. A deposit having at least 20,000 micropores per square inch results. The process may be used to make multiple layer articles having an outer layer of microporous chromium.