Vehicle exhaust gas analysis system
CA 1045847 A · Owner: United Technologies Corporation · Inventors: Knights, Anthony D.M.; Jowett, Terence W.; Rabinowitz, Charles M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a gas analysis system for measuring the amount of a selected contaminant contained within a sample gas. The system includes a gas sample cell which contains the gas and a reference cell containing a reference gas. The sample cell gas can be filled with ambient air. The system also includes a moving beam infrared energy generator to pass the beam alternately through the reference cell and the sample cell. A detector is positioned to receive the energy beam after it has passed through the cells, and the detector includes a filter which transmits only a selected narrow wave band within the spectrum of the infrared energy beam. The detector produces first and second …
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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
- Granted January 9, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 9, 1996.
- 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.