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:
Nov. 19, 1991
Filed:
Apr. 26, 1989
Kiyoshi Morimoto, Mobara, JP;
Shigeo Itoh, Mobara, JP;
Takeshi Tonegawa, Mobara, JP;
Takahiro Niiyama, Mobara, JP;
Futaba Denshi Kogyo Kabushiki Kaisha, Mobara, JP;
Abstract
An indirectly heated filamentary cathode capable of significantly reducing its resistance, uniformly emitting electrons therefrom and effectively elminating its insulation failure. In the filamentary cathode, a cathode substrate is constituted by a metal conductive layer of a cylindrical shape arranged so as to be contacted with and electrically insulating layer and a fine metal wire wound which are closely contacted together, so that an electron emitting layer may be deposited through the metal conductive layer on the electrically insulating layer.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile