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. 25, 1977
Filed:
Apr. 12, 1976
Applicant:
Inventors:
Shichio Kawai, Sakura, JA;
Takaho Tanaka, Sakura, JA;
Eisuke Bannai, Sakura, JA;
Kenji Uchida, Sakura, JA;
Ryuichi Shimizu, Minou, JA;
Assignee:
National Institute for Researches in Inorganic Materials, Ibaraki, JA;
Primary Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01K / ;
U.S. Cl.
CPC ...
3133 / ; 252509 ; 252521 ; 313336 ;
Abstract
A single crystal of lanthanum hexaboride is used as a tip of a thermionic emission cathode.