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. 14, 2008
Filed:
May. 01, 2003
Neil Alexander Downie, Guildford, GB;
Stuart Alexander Kerr, Knutsford, GB;
Neil Alexander Downie, Guildford, GB;
Stuart Alexander Kerr, Knutsford, GB;
Air Products and Chemicals, Inc., Allentown, PA (US);
Abstract
The concentration of xenon, in a medical gas mixture of xenon as an active component with a known composition of oxygen and, optionally, nitrogen and/or helium recirculating through a medical device () in which carbon dioxide is introduced into the mixture, is monitored by removal () of carbon dioxide downstream of the medical device () and subsequently passing the carbon dioxide-free gas through an ultrasonic gas analyser () upstream of the medical device. The gas analyzer determines the xenon concentration by measuring the time delay between transmission of an ultrahigh frequency ultrasonic pulse of at least 100 kHz axially through the sample chamber from a location at one end thereof and reflection of said pulse axially from the other end of the sample chamber back to said location. An analyser of novel construction is disclosed.