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. 29, 1996
Filed:
May. 19, 1995
Applicant:
Inventors:
Sidney E Buttrill, Jr, Palo Alto, CA (US);
Alex V Mordehai, Mountain View, CA (US);
Assignee:
Varian Associates, Inc., Palo Alto, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
B01D / ; H01J / ;
U.S. Cl.
CPC ...
250292 ; 250282 ; 250287 ; 2504 / ;
Abstract
A time-of-flight mass spectrometer includes an ion beam source having a quadrupole ion trap. To form a parallel ion beam, the ions are simultaneously sucked and pulsed out of an interaction region of the trap through an opening in a front end cap electrode of the trap by applying different polarity voltage pulses at the same time to the front end cap electrode and a back end cap electrode of the trap.