Chemistry: analytical and immunological testing – Nitrogen containing – Oxides of nitrogen
Reexamination Certificate
2006-05-16
2006-05-16
Gakh, Yelena G. (Department: 1743)
Chemistry: analytical and immunological testing
Nitrogen containing
Oxides of nitrogen
C436S164000, C436S166000, C436S172000
Reexamination Certificate
active
07045359
ABSTRACT:
The present invention relates to an apparatus and method for determining the concentration of nitric oxide (NO) in a gas mixture such as air. The gas sample containing NO is mixed with a gas containing ozone (O3), and the change in the ozone concentration is measured after a sufficient time is allowed for the reaction between NO and O3to take place and destroy a measurable quantity of O3. In the disclosed embodiment, the concentration of ozone is measured using the technique of UV absorption. In this case, the invention has the advantage over other instruments for measuring NO of having absolute calibration based on the known extinction coefficient for ozone at ultraviolet wavelengths. The invention discloses both static and dynamic flow systems, and the NO concentration measurements may be made over a wide pressure range.
REFERENCES:
patent: 3528779 (1970-09-01), Fontijn
patent: 3904371 (1975-09-01), Net et al.
patent: 4240798 (1980-12-01), Wendelin et al.
patent: 4277259 (1981-07-01), Rounbehler et al.
patent: 4657744 (1987-04-01), Howard
patent: 4822564 (1989-04-01), Howard
patent: 4849178 (1989-07-01), Azuma
patent: 5047352 (1991-09-01), Stetter et al.
patent: 5356818 (1994-10-01), Johnson
patent: 5922610 (1999-07-01), Alving et al.
patent: 6033368 (2000-03-01), Gaston, IV et al.
patent: 6096267 (2000-08-01), Kishkovich et al.
patent: 6099480 (2000-08-01), Gustafsson
patent: 6100096 (2000-08-01), Bollinger et al.
patent: 6207460 (2001-03-01), Kishkovich et al.
patent: 6296806 (2001-10-01), Kishkovich et al.
patent: 6346419 (2002-02-01), Ryerson et al.
patent: 6635415 (2003-10-01), Bollinger et al.
patent: 174093 (1986-03-01), None
patent: S51-36342 (1976-04-01), None
patent: 57173740 (1982-10-01), None
patent: 01248041 (1989-10-01), None
patent: 03282355 (1991-12-01), None
Mok et al. “Reduction of Nitrogen Oxides by Ozonization-Catalysis Hybrid Process”, Korean J. Chem. Eng., 21(5), 976-982 (2004).
Allergol Immunopathod (Madr) 2000. 28(3):124-35 (Abstract).
Clin Sci (Lond) 1999, 96(1):67-74 (Abstract).
International Search Report mailed Oct. 1, 2003—International Application No. PCT/US03/22234 filed Jul. 16, 2003.
PCT Written Opinion, date of mailing Aug. 16, 2004 for International Application No. PCT/US03/22234 filed Jul. 16, 2003.
Birks John W.
Bollinger Mark J.
Gakh Yelena G.
Law Aileen
Novanox, LLC
Patent Law Offices of Rick Martin P.C.
LandOfFree
Method and apparatus to detect a gas by measuring ozone... does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Method and apparatus to detect a gas by measuring ozone..., we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus to detect a gas by measuring ozone... will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3604047