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. 23, 1995
Filed:
Nov. 24, 1993
Applicant:
Inventor:
Andreas Linhard, Owingen, DE;
Assignee:
Elo-Chem Atztechnik GmbH, , DE;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C25F / ; C25F / ;
U.S. Cl.
CPC ...
2041291 ; 204130 ;
Abstract
Traditional recommendations consider the nitrate that occurs in the electrolysis cell as an interfering factor and attempt to remove the nitrate completely or largely from the etching solution. In accordance with the invention, it is recommended to operate the etching installations with a certain optimum nitrate content which brings about a considerable acceleration of etching speed and to realize an upper limit only by adding reducing agents whereby the reducing agents have the added advantage that for example in the electrolysis cell they favor the conversion from copper II to copper I.