Method and apparatus for measuring fluid thermal conductivity
CA 2098867 C · Owner: Hori, Tomoshige · Inventors: Ito, Kensuke; Shiinoki, Yasuhiko; Hori, Tomoshige
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A heating sensor is disposed within the pipe wherein a clearance defined between inner wall of the measuring pipe and outer surface of the heating sensor is dimensioned so that the measurement may be free from any influence of a connective heat transfer. Temperatures of the fluid and the heating sensor are measured and a differential temperature therebetween in the steady state is determined. A correlation established between the differential temperature and a thermal conductivity of the fluid is utilized to obtain the thermal conductivity of this fluid. Alternatively the differential temperature, between the fluid being measured and the heating sensor may be controlled at a constant value …
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 21, 1993 and granted March 21, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 21, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 21, 2015.
- 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.