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. 25, 1976
Filed:
Feb. 06, 1974
Applicant:
Inventors:
Kurt Heymann, Berlin, DT;
Gunter Woldt, Berlin, DT;
Assignee:
Schering Aktiengesellschaft, Berlin and Bergkamen, DT;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B05D / ; B05D / ;
U.S. Cl.
CPC ...
427430 ; 204 30 ; 204 / ; 427306 ;
Abstract
In the pickling and activation of plastic surfaces with a chromo-sulfuric acid bath containing a noble metal chloride, the bath is boiled prior to use for a period of time sufficient to eliminate substantially all free chlorine present. Thereafter the plastic surface is pickled and activated in the bath, and then chemical metal plated.