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. 17, 1995
Filed:
Nov. 28, 1994
Applicant:
Inventor:
Hwanchul Roh, Kyunggi, KR;
Assignee:
Samsung Electron Devices Co., Ltd., Kyunggi, KR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
313270 ; 3133 / ; 313441 ; 3133 / ;
Abstract
An impregnated cathode structure has: (1) a sleeve having a truncated conically-shaped top portion with an opening having a predetermined diameter at the center thereof; (2) oxide cathode material formed within and conforming to the shape of the sleeve to form a point exposed through the opening; (3) a receiver forming part of said sleeve for retaining the oxide cathode material; (4) a backing plug which divides the inside of the sleeve so as to form a space for the receiver; and (5) a heater installed in the sleeve below the backing plug.