Method and apparatus for measuring concentration of matter in liquid by using microwaves
CA 2196375 C · Owner: Hirai, Renzou · Inventors: Hirai, Renzou; Yamazu, Shigeki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An apparatus comprising a measuring unit for measuring a property of microwaves by transmitting microwaves through a fluid containing matter to be measured, a storing unit for storing a correction parameter set of a sensitivity coefficient and a mixture ratio concerning the matter to be measured and, a calculating unit for calculating a concentration of the matter to be measured from the property of the microwaves obtained by the measuring unit and the correction parameter set obtained in the storing unit.
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 January 30, 1997 and granted August 14, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2019.
- 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.