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. 08, 1996
Filed:
Sep. 20, 1994
Applicant:
Inventor:
Shirofumi Yamagishi, Ootawara, JP;
Assignee:
Kabushiki Kaisha Toshiba, Kawasaki, JP;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
2502 / ; 313-7 ;
Abstract
An X-ray image intensifier incorporates a pair of opposed electrodes and an ion pump within a vacuum vessel. The ion pump supplies a magnetic field to a space between the opposed electrodes. At least one of the opposed electrodes is connected to focusing electrodes in the vacuum vessel. With this structure, the vacuum vessel can be maintained in a high vacuum for a long period of time.