Canadian application, no grantCanada
Method of and system for controlling a variable speed induction motor
CA 2303050 A1 · Owner: Shah, Mahesh J. · Inventors: Shah, Mahesh J.; Seffernick, George H.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of and system for controlling an induction motor detects input frequency to the motor and connects windings of the motor in one of a plurality of configurations in dependence upon the detected frequency.
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 September 10, 1998. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 10, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2020.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledSeptember 10, 1998
GrantedNo grant recorded
Term endedSeptember 10, 2018
Patent numberCA 2303050 A1
Classification (IPC)H02P7/00 +1 more
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.