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. 18, 1986
Filed:
Jan. 12, 1982
Applicant:
Inventor:
Guy Clerc, Paris, FR;
Assignee:
Thomson-CSF, Paris, FR;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ; H01J / ; H01K / ;
U.S. Cl.
CPC ...
3133 / ;
Abstract
The invention provides a direct heating thermo-electronic emission cathode comprising a pyrolytic graphite support and an emissive coating formed of a mixture of tungsten and lanthanum oxide, the tungsten being transformed in its surface part into tungsten hermicarbide.
Clerc, Guy. (1986). Direct heating cathode and a process for manufacturing same (U.S. Patent No. 4577134). U.S. Patent and Trademark Office. https://idiyas.com/patent/badge/4577134
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile