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. 20, 1987
Filed:
Sep. 04, 1981
Wilbur S Hall, Plymouth Meeting, PA (US);
Amchem Products, Inc., Ambler, PA (US);
Abstract
In a process wherein a resinous coating is formed on a metallic surface by immersing the surface in an acidic aqueous coating composition containing dispersed particles of resin, wherein said composition forms on said surface a resinous coating which increases in thickness the longer the surface is immersed in the composition and wherein the resinous coating is contacted with an aqueous solution containing Cr to improve properties of the resinous coating, the improvement comprising contacting said resinous coating with an acidic aqueous solution prepared by combining a hexavalent Cr-containing compound, an aqueous mixture of hexavalent chromium/reduced chromium, and an acid or a soluble salt thereof.