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:
Jun. 02, 1992
Filed:
Dec. 20, 1990
Applicant:
Inventors:
Tamotsu Kondow, Etchujima, Koto-ku, Tokyo, JP;
Takashi Nagata, Tokyo, JP;
Yutaka Yamamoto, Kanagawa, JP;
Assignees:
Nippon Oil Company, Limited, Tokyo, JP;
Other;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250288 ; 2504 / ; 250427 ;
Abstract
Provided is a Rydberg atom impact type ion source in a mass spectrometric apparatus wherein gaseous sample molecule is impinged on Rydberg atom to ionize the sample and thus-ionized sample is subjected to mass spectrometric analysis, said ion source being characterized in that a needle rod-like grid is used in a Rydberg atom generating portion of an ion source block.