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:
Mar. 17, 1987
Filed:
Oct. 22, 1984
Applicant:
Inventors:
William J Fies, Jr, Portola Valley, CA (US);
Paul E Kelley, San Jose, CA (US);
Walter E Reynolds, Woodside, CA (US);
George C Stafford, Jr, San Jose, CA (US);
John E Syka, Sunnyvale, CA (US);
Assignee:
Finnigan Corporation, San Jose, CA (US);
Primary Examiner:
Int. Cl.
CPC ...
B01D / ;
U.S. Cl.
CPC ...
250282 ; 250286 ; 250288 ; 250292 ;
Abstract
The method of operating a quadrupole ion trap in which the mass range of interest is analyzed in segments by trapping ions of successive mass ranges within the segments whereby the operating parameters for each segment may be selected to improve sensitivity and resolution.