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:
Dec. 21, 1993
Filed:
Nov. 03, 1992
Applicant:
Inventors:
Frank A Muller, Los Angeles County, CA (US);
David J Tomlinson, Los Angeles County, CA (US);
Assignee:
Elf Atochem North America, Inc., Philadelphia, PA (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B44C / ; C23F / ;
U.S. Cl.
CPC ...
156665 ; 134-3 ; 252 793 ; 427309 ;
Abstract
In the etching and deoxidizing of aluminum, suppression of aluminum oxyfluoride crystal formation by the incorporation of phosphoric acid into an etchant/deoxidizer solution containing water, ferric sulfate, nitric acid, and HF or fluoride salts.