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. 05, 1988
Filed:
Oct. 24, 1985
Applicant:
Inventors:
Juan Hajdu, Orange, CT (US);
Martin W Bayes, Ossining, NY (US);
Assignee:
Enthone, Incorporated, West Haven, CT (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H05K / ; H05K / ; C23F / ;
U.S. Cl.
CPC ...
156280 ; 156278 ; 156901 ; 148-624 ; 427399 ; 427 96 ; 422-7 ;
Abstract
A composition and process is disclosed for improving the leach resistance of the copper oxide coating on the copper circuitry of printed circuit boards to solutions used in their preparation which comprises contacting the copper oxide of the circuit board with a solution containing an amphoteric element which forms an acidic oxide, such as selenium dioxide.
Hajdu, Juan. (1988). Process for the treatment of copper oxide in the preparation of printed (U.S. Patent No. 4717439). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4717439
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile