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:
Nov. 25, 2008
Filed:
Aug. 19, 2004
Applicants:
Scott T. Quarmby, Round Rock, TX (US);
Jae C. Schwartz, San Jose, CA (US);
John E. P. Syka, Charlottesville, VA (US);
Inventors:
Scott T. Quarmby, Round Rock, TX (US);
Jae C. Schwartz, San Jose, CA (US);
John E. P. Syka, Charlottesville, VA (US);
Assignee:
Thermo Finnigan LLC, San Jose, CA (US);
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01J 49/42 (2006.01);
U.S. Cl.
CPC ...
Abstract
Ions in a predefined narrow mass to charge ratio range are isolated in an ion trap by adjusting the field and using ejection frequency waveform(s). Thus the mass-to-charge ratio isolation window is controlled and has an improved resolution without increasing the number of frequency components.