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:
Aug. 03, 1976
Filed:
Dec. 06, 1974
Applicant:
Inventors:
Siegfried Hendrik Hagen, Emmasingel, Eindhoven, NL;
Cornelis VAN Osenbruggen, Emmasingel, Eindhoven, NL;
Herman Anton, Emmasingel, Eindhoven, NL;
Joseph Reemers, Emmasingel, Eindhoven, NL;
Gerrit Verspui, Emmasingel, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
C25F / ; C25F / ; C25F / ;
U.S. Cl.
CPC ...
2042 / ; 20412955 ;
Abstract
Electrode for electrochemically machining electrically conducting workpieces, in particular machining them by removal of material, which electrode is locally coated with a screening layer consisting of a polycristalline semiconductor material, which layer preferably comprises two component layers of p and n-conductivity type respectively.