A viscous heater
CA 2223995 A1 · Owner: Yagi, Kiyoshi · Inventors: Mori, Hidefumi; Hirose, Tatsuya; Yagi, Kiyoshi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A viscous heater is provided which can attain the improvement of heating efficiency while preventing the leakage of a viscous fluid ascribed to the expansion thereof. To form such a viscous heater a flat disc type rotor (15) , is employed and a housing is formed by a front housing body (1) a front , plate (2) a rear plate (3) and a rear housing body (4) these parts being , assembled and fastened to one another by through bolts (7). The front plate (2) is provided with a recessed surplus space (11) communicating at its outer circumferential portion with a heating chamber (8) between respective through bolts (7) and water passages (10).
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 March 26, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended March 26, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 26, 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.