Method and apparatus for gas analysis
CA 2019571 C · Owner: Spegas Industries Ltd. · Inventors: Rosenfeld, Elieser Zwi; Coleman, Lewis
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
There is provided a gas analyzer, including a radiation source an analytical space through which passes the gas to be analyzed at, least one detector for detecting the intensity of radiation passing through the space, means facilitating the alternating introduction into the space, of the gas to be analyzed and a reference gas having a concentration located at least in the upper half of the range of concentrations to be measured by the gas analyzer. The analyzer further includes processing means, having memory means to process, signals originating in the detector the memory means adapted to store, in a first mode of operation signals representing instantaneous intensity values of the …
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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 21, 1990 and granted September 9, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 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
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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.