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. 29, 1985
Filed:
Apr. 27, 1984
Applicant:
Inventors:
Brooks M Whitehurst, New Bern, NC (US);
Donald F Clemens, Greenville, NC (US);
Taylor King, Beaufort, NC (US);
Garnett B Whitehurst, New Bern, NC (US);
Assignees:
Whitehurst Associates, Inc., New Bern, NC (US);
Encee Chemical Sales, Inc., New Bern, NC (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C09K / ; C09K / ; C09K / ; C23F / ;
U.S. Cl.
CPC ...
252 792 ; 156665 ; 156903 ; 252 793 ; 252 794 ;
Abstract
This invention teaches the development of a chemical reagent useful as an aluminum brightening bath. The reagent's composition is primarily wet-process phosphoric acid to which has been added small quantities of nitric acid, copper, and optionally traces of several other substances. The reagent does not require expensive removal of the natural impurities found in wet-process phosphoric acid.