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:
Mar. 16, 1976
Filed:
Apr. 08, 1974
Applicant:
Inventor:
Michael Sayer, Kingston, CA;
Assignee:
Canadian Patents & Development Ltd., Ottawa, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01B / ;
U.S. Cl.
CPC ...
3133 / ; 313337 ; 252518 ; 252521 ;
Abstract
A thermionic emitter for apparatus such as electron microscopes, scanning electron microscopes, and high power vacuum tubes which require a source of electrons formed from lanthanum strontium vanadate which is prepared from the compounds La.sub.(1.sub.-x) Sr.sub.(x) VO.sub.3, where x is the fraction of strontium (Sr) incorporated into LaVO.sub.3. The value of x lies between 0.1 and 0.4.