Heating apparatus for vehicle
CA 2209976 C · Owner: Ito, Hajime · Inventors: Aoki, Shinji; Kato, Yasushi; Ito, Hajime
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A viscous heater for heating cooling water for cooling a water cooled engine is disposed in a cooling water circuit and a front heater core is disposed in the cooling water circuit at a downstream side of the viscous heater with reference to a flow direction of the cooling water. Only when a heating operation is the maximum heating operation or the maximum heating operation is desired, a viscous clutch is turned on to transmit a driving force of the engine to the viscous heater. When the maximum heating operation is not desired, the viscous clutch is turned off so that the driving force of the engine is not transmitted to the viscous heater. Therefore a load of the engine is reduced, and …
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 July 21, 1997 and granted September 5, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 21, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 21, 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.