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. 28, 2003
Filed:
Apr. 12, 2001
Applicant:
Inventors:
Assignee:
National Research Council Canada, Ottawa, CA;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H01J 4/940 ;
U.S. Cl.
CPC ...
H01J 4/940 ;
Abstract
The present invention relates to a method of separating ions having the same mass to charge ratio but different ion mobility characteristics, based on the ion focussing principles of high field asymmetric waveform ion mobility spectrometry. Isomers including gas-phase molecular anions of the amino acids leucine and isoleucine are separable by the method of the present invention. Identification of different conformers of ions at the same charge state, including conformers present at certain charge states of the protein bovine ubiquitin, is also possible using the method of the present invention.