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:
Jan. 29, 2013
Filed:
May. 29, 2009
Applicants:
Wei Xu, West Lafayette, IN (US);
William Chappell, Lafayette, IN (US);
Zheng Ouyang, West Lafayette, IN (US);
Robert Graham Cooks, West Lafayette, IN (US);
Inventors:
Wei Xu, West Lafayette, IN (US);
William Chappell, Lafayette, IN (US);
Zheng Ouyang, West Lafayette, IN (US);
Robert Graham Cooks, West Lafayette, IN (US);
Assignee:
Purdue Research Foundation, West Lafayette, IN (US);
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
B01D 59/44 (2006.01);
U.S. Cl.
CPC ...
Abstract
The invention herein generally relates to non-destructive, high order harmonic ion motion image current detection. In certain embodiments, ion motion corresponding to high order harmonic frequencies, instead of the secular frequencies, is detected using image current detection with a constant excitation applied to the waveform signal.