Composition monitor and monitoring process using impedance measurement
CA 2000223 C · Owner: Den Norske Stats Oljeselskap A.S. · Inventors: Gaisford, Scott G.; Bjornsen, Bjorn G.; Watjen, John P.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Radio frequency bridge techniques are used to parameterize the complex dielectric properties of solids liquids, gases and mixtures thereof. This parameterization is performed in an electrically isolated physically open, structure which allows continuous or batch monitoring of the materials and their mixtures. A method and apparatus are provided for measuring the composition of multicomponent process streams flowing in pipes or ducts. The method uses the pipe in which the mixture flows as a waveguide in which propagating radio frequency electromagnetic energy is induced through dielectric loaded apertures. The dielectric measurement is performed in an electrically isolated flow, through test …
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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 October 5, 1989 and granted June 29, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 5, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 5, 2011.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.