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. 26, 1985
Filed:
Dec. 05, 1983
Applicant:
Inventor:
Daniel D Johnson, Yorklyn, DE (US);
Assignee:
E. I. Du Pont de Nemours and Company, Wilmington, DE (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
C23F / ; B44C / ; C03C / ; B29C / ;
U.S. Cl.
CPC ...
156644 ; 29853 ; 29882 ; 156150 ; 156630 ; 156634 ; 156645 ; 156652 ; 156656 ; 156668 ; 156902 ; 204 24 ;
Abstract
A conductive through-hole hole is formed by liquid chemically etching a hole completely through a dielectric sandwiched between conductors and by deforming at least one conductor which has been undercut during the etching.
Johnson, Daniel. (1985). Liquid chemical process for forming conductive through-holes through a (U.S. Patent No. 4501638). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4501638
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile