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:
Sep. 15, 1998
Filed:
Sep. 17, 1997
Applicant:
Inventors:
Assignee:
Primary Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2504 / ;
Abstract
The invention relates to apparatus for generating an electron beam with an ptical waveguide, a light source which is coupled on one end of the optical waveguide, a coating for generated electrons which is applied to the other end of the optical waveguide as well as field-generating means in order to lower the electron work function of the coating so far that a photoemission current can be generated. According to the invention a metal carbide is used as the coating.