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. 19, 2004
Filed:
Sep. 13, 2002
Applicant:
Inventors:
Roger Guevremont, Gloucester, CA;
Randy Purves, Gloucester, CA;
Assignee:
National Research Council Canada, Ottawa, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 4/900 ;
U.S. Cl.
CPC ...
H01J 4/900 ;
Abstract
A method and an apparatus is disclosed for selectively transmitting ions in which the ions are subjected to a focusing effect such that the overall efficiency of ion transmission is increased. The method relies on a FAIMS analyzer having at least an electrode disposed approximately between two other electrode surfaces for producing an electric field that is symmetric on opposing sides of the at least an electrode. An ion exiting from between the electrodes experiences a balanced electric field, such that impact with one of the electrodes is prevented.