Induction heating device for rolling roller and method of induction heating
CA 2358815 C · Owner: Aoi, Tatsufumi · Inventors: Mizuta, Keiji; Aoi, Tatsufumi; Yamamoto, Mikio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An induction heating device for heating a rolling roller by induction heating so as to equalize the diameter of the rolling roller, comprises: an induction heater; an induction heater moving means for moving the induction heater to a heating portion while a distance from the induction heater to the surface of a portion to be heated is kept constant; an electric power supply means for supplying electric power to the induction heater; and a heat quantity adjusting means for adjusting the quantity of heat of the induction heater according to the quantity of heat required by the heating portion. The heat quantity adjusting means includes a frequency control means for controlling the frequency …
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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 11, 2001 and granted December 2, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 11, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 11, 2023.
- 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.