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:
Feb. 08, 1983
Filed:
Dec. 28, 1981
Applicant:
Inventors:
Masaaki Takahashi, Taito-ku, Tokyo, JP;
Hideki Hamamura, Suita, Osaka, JP;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ; B44C / ; C03C / ; C03C / ;
U.S. Cl.
CPC ...
156642 ; 156665 ; 252 795 ;
Abstract
An etch solution for aluminum and the alloys thereof, after being used in caustic etching is regenerated, without using a large amount of heat energy for the concentration of the solution and without causing the accumulation of impurities in the etch solution, by