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:
Oct. 24, 1995
Filed:
Jul. 12, 1994
Applicant:
Inventors:
Ronald Van Der Wilk, Eindhoven, NL;
Gerardus A Vrijssen, Eindhoven, NL;
Assignee:
U.S. Philips Corporation, New York, NY (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
445 46 ; 445 59 ;
Abstract
Electrodes of an electron gun are etched in an electrochemical bath. The electrodes to be etched serve as the anode in the bath. The side of the electrode to be etched which faces the cathode in the chemical bath, faces an electrode at a higher potential in the assembled electron gun.