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:
Aug. 07, 1990
Filed:
Dec. 16, 1988
Fred D Hawker, Villa Park, IL (US);
Victor E Pietryga, Berwyn, IL (US);
Robert W Byrd, Burr Ridge, IL (US);
James Wichmann, Schaumburg, IL (US);
Patricia A Nicpon, Arlington Heights, IL (US);
DeSoto, Inc., Des Plaines, IL (US);
Abstract
A method, and aqueous emulsion, for coating a metal part with a peelable mask that is resistant to attack by the strong acid and strong base etchants used in chemical milling are disclosed. The method comprises contacting a polyvalent metal cation salt-surfaced part with an anionic emulsion for a time period effective to coat the part. The anionic emulsion includes coalescent rubbery particles and pigment and has a total solids content of at least about 10 weight percent. The weight ratio of pigment to rubbery particles is about 0.1:1 to about 2:1, respectively.