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:
Apr. 07, 1998
Filed:
Jul. 19, 1996
Applicant:
Inventors:
Hiroyuki Kyushima, Hamamatsu, JP;
Takayuki Omura, Hamamatsu, JP;
Kimitsugu Nakamura, Hamamatsu, JP;
Suenori Kimura, Hamamatsu, JP;
Yousuke Oohashi, Hamamatsu, JP;
Masuo Ito, Hamamatsu, JP;
Assignee:
Hamamatsu Photonics K.K., Shizuoka-ken, JP;
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250207 ; 313533 ; 3131 / ;
Abstract
In a photomultiplier tube, a second dynode Dy2 is located in confrontation with a first dynode Dy1 in an electron multiplication portion 6. The second dynode Dy2 is made of material that has a secondary electron emission gain which is substantially saturated with respect to an electric voltage applied thereto.