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. 27, 1979
Filed:
Aug. 11, 1977
Akira Misumi, Mobara, JP;
Masaharu Kumada, Mobara, JP;
Hitachi, Ltd., , JP;
Abstract
Base metal plate materials for a directly heated oxide cathode consisting mainly of nickel and containing 10-22% by weight of molybdenum, 1-8% by weight of tungsten and a small amount of at least one reducing agent such as zirconium can make the oxide layer of the cathode more difficult to be peeled off and are almost similar in mechanical strengths at high temperatures, specific electric resistance and the diffusion velocity of zirconium as compared with prior art materials consisting mainly of nickel and containing 20-30% by weight of tungsten and 0.3-5% by weight of zirconium, and can further permit maintenance of the electron emissive ability of the oxide cathode.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile