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:
Jul. 28, 2026
Filed:
Sep. 12, 2022
Nuflare Technology, Inc., Yokohama, JP;
Nobuo Miyamoto, Yokohama, JP;
NuFlare Technology, Inc., Yokohama, JP;
Abstract
A method for estimating the cathode lifetime of an electron gun includes recording the change amount, per unit temperature increase of the cathode of an electron gun which emits an electron beam, with respect to a parameter value relating to the electron beam, to be recorded in relation to the usage time of the cathode, and estimating the lifetime of the cathode by one of estimating a time obtained by adding a predetermined time to a time at which the change amount recorded a plurality of times becomes lower than a prescribed value as the lifetime of the cathode, and estimating, using an approximate line obtained by approximating the change amount recorded a plurality of times, a time at which the change amount becomes zero as the lifetime of the cathode, and outputting the estimated lifetime.