Gas concentration measuring device
CA 1077298 A · Owner: Adrian, Werner · Inventors: Adrian, Werner
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A device for measuring concentration of a gas adapted to be used for measuring the concentration of alcohol molecules in exhaled breath. The device relies for its operation on the known phenomenon that radiation is absorbed by different materials at different characteristic wavelengths. Radiation of a wavelength which will be absorbed by the gas to be tested the opposite end of the tube. Partly to increase the path length by causing many internal reflections to occur and partly to reduce the overall size of the device the tube is, curved either in the form of a helix with constant or varying radius of curvature or is curved first one way and then the next in a serpentine fashion. Gas whose …
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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 May 13, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 13, 1997.
- 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.