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. 04, 1989
Filed:
May. 22, 1987
Applicant:
Inventor:
Michael Weber-Grabau, San Jose, CA (US);
Assignee:
Finnigan Corporation, San Jose, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J / ;
U.S. Cl.
CPC ...
250282 ; 250291 ; 250292 ;
Abstract
The method of isolating ions of single mass or narrow range of masses in a three-dimensional ion trap comprising ionizing a sample in the trap at a low RF voltage, increasing the RF voltage and applying a DC voltage whereby to eject unwanted ions while isolating ions of said single mass or narrow range of masses.