Remote sensing gas analyzer
CA 2018190 C · Owner: Hunt, Robert N. · Inventors: Hunt, Robert N.; Sandridge, Robert L.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A particular area or areas are monitored for the presence of gaseous materials, particularly pollutants by analyzing background infrared radiation present in the selected area with a spectrometer and making the results of this analysis available in a form understandable to the person or device monitoring the area for the presence of specified gaseous materials. The results of the spectrometric analysis may for, example, be displayed on a video unit or they may be printed. Apparatus useful in the practice of this invention generally includes an interferometer of the Michaelson-Morely type having specific optical characteristics, a sensitive infrared detector electronic data processor, and a …
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Listed from its CIPO record in Patent Yard's archive of Canadian patents past their term. Its claims, description and drawings are in the CIPO record and on Google Patents, and the Claude kit works from them.
Why it's free to use
- Filed June 4, 1990 and granted May 2, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
Timeline From CIPO dates
Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.