Testing apparatus for gas sensors
CA 2238141 A1 · Owner: National Draeger Incorporated · Inventors: Warburton, Piers Richard Grove
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A gas sensor, (8) includes a body, (10) that is shaped to define a chamber (14). An electrolyte (34) is contained in the chamber (14) and three electrodes (26 28 and 30) that are, located on an electrode substrate (24) are disposed in contact with the electrolyte. The body (10), is electrically connected to the three electrodes. A cover (36) engages the body (10) to enclose the chamber (14). A resistor array (58a-58n) is located between the cover (36) and the electrode substrate (24). The resistors (58a-58n) are coated with a compound that emits a predetermined gas in response to temperature increase. To test the sensor (8) voltage is selectively applied to, the resistor array (58a-58n) to …
Read the whole patent
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 23, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 23, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 23, 2020.
- 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.