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:
Nov. 20, 1979
Filed:
Jul. 17, 1978
Applicant:
Inventor:
Nicholas J Spiliotis, Parsippany, NJ (US);
Assignee:
Allied Chemical Corporation, Morristown, NJ (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C25D / ; C23F / ; C09K / ;
U.S. Cl.
CPC ...
204 15 ; 156 66 ; 252 793 ;
Abstract
In printed circuit board manufacture, a copper pattern on the board is slightly etched and then a tin/lead layer is plated onto the etched copper pattern. The etching step is free of sulfate materials and includes etching the copper pattern with an aqueous solution of hydrogen peroxide and fluoboric acid.
Spiliotis, Nicholas. (1979). Sulfate-free method of etching copper pattern on printed circuit boards (U.S. Patent No. 4175011). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4175011
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile