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. 01, 1991
Filed:
Sep. 16, 1988
Applicant:
Inventors:
Daniel Tytgat, Brussels, BE;
Stefaan Magnus, Halle, BE;
Assignee:
Solvay & Cie (Societe Anonyme), Brussels, BE;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
C23F / ;
U.S. Cl.
CPC ...
156666 ; 252 792 ;
Abstract
Baths for the chemical polishing of copper or copper alloy surfaces, comprising, in aqueous solution, hydrogen peroxide, chloride ions, phosphoric acid and phosphate and hydrogenphosphate ions, in quantities adjusted so as to impart a pH of between 1.25 and 3 to the bath.