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:
Aug. 19, 2003
Filed:
Jul. 07, 2000
Applicant:
Inventors:
Suhas Narayan Ketkar, Allentown, PA (US);
Seksan Dheandhanoo, Quakertown, PA (US);
Assignee:
Air Products and Chemicals, Inc., Allentown, PA (US);
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
G01N 1/910 ; G01N 2/764 ; G01T 1/18 ; H01J 4/702 ;
U.S. Cl.
CPC ...
G01N 1/910 ; G01N 2/764 ; G01T 1/18 ; H01J 4/702 ;
Abstract
A device for measuring a total concentration of impurities in a sample gas is provided which includes a housing having an inlet to allow the sample gas to enter the housing, an emitter to generate ions from the sample gas, a field gradient to accelerate the ions toward a collector, the collector adapted to measure total ions, and an outlet to allow the sample gas to exit the housing, whereby a change in total ions received by the collector indicates a change in the total concentration of impurities in the sample gas.