Multiple k factor, selectable gas detector
CA 2129113 C · Owner: Noble, Peter M. · Inventors: Novack, Robert L.; Coppler, Mark J.; Tozier, John E.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas detector apparatus (2) as for determining the concentration of a selected (12) one of a plurality of predetermined gases includes a gas sensor (38) which generates a gas output signal related to the concentration of the selected (12) predetermined gas in the gas sample (22). A K factor storage (52) associated with the gas sensor (38) stores at least one K factor unique to, and generated by using the gas sensor (38) for each of the plurality of predetermined gases. A processor (56) in response to a, selected (12) gas control signal (12) selects the K factor or factors from the K factor storage (52) for the selected gas and in, accordance with a predetermined process stored (74,76) …
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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 February 10, 1993 and granted November 4, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 10, 2015.
- 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.