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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.:

US 5757115 B1

PDFFull Text
Date of Patent:
May. 26, 1998

Filed:

May. 31, 1995

Cathode member and electron tube having the cathode member mounted

Applicant:
Inventors:

Maki Narita, Shiga, JP;

Toshikazu Sugimura, Shiga, JP;

Hiroyuki Sakatani, Shiga, JP;

Tsuyoshi Tanabe, Shiga, JP;

Assignee:

NEC Corporation, Tokyo, JP;

Attorney:

Young & Thompson

Primary Examiner:

Sandra L O'Shea

Assistant Examiner:

Mack Haynes

Int. Cl.
CPC ...
H01J / ; H01J / ; H01J / ; H01J / ;
U.S. Cl.
CPC ...
3133 / ; 313355 ;
Abstract

With a production of a cathode member for an electron tube having cathode materials containing Ni, a metal having a reduction behavior and an electron emissive agent sintered to be one body and its electron emitting surface subjected to a specular processing, it is possible to obtain an inexpensive cathode characterized by that: the operation temperature is low; the electron emission distribution is excellent because of the smooth electron emitting surface; and the electron emission is enabled with a high current density for a long interval of time.

Find Patent Forward Citations

Narita, Maki. (1998). Cathode member and electron tube having the cathode member mounted (U.S. Patent No. 5757115). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/5757115

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