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:
Mar. 18, 1997
Filed:
Feb. 14, 1996
Daniel J Ragsdale, Quakertown, PA (US);
George H Smudde, Jr, Macungie, PA (US);
David A Zatko, Lansdale, PA (US);
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
The present invention is directed to a method of detecting trace levels of contained interactive gas, such as oxygen, in gases containing trace levels of interactive gas, such as oxygen, by doping a known low level amount of interactive gas (i.e., oxygen) into the detection apparatus to saturate interactive gas reactive or adsorptive sites in the apparatus, thus allowing the accurate, reproducible and responsive detection of contained interactive gas. More particularly, the present invention dopes a carrier gas of a gas chromatograph with low levels of oxygen in order to detect contained trace oxygen in a sample of a gas being analyzed for contained trace oxygen.