Motor protector
CA 2481135 C · Owner: Watson, Arthur I. · Inventors: Watson, Arthur I.; Arumugam, Arunkumar; Du, Michael Hui
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A system and method is provided for reducing the wear on a motor protector particularly when used in an abrasive environment. The motor protector comprises an outer housing having an internal shaft. The motor protector further comprises a head section having an abrasives exclusion mechanism to reduce the amount of abrasive material contacting a specific component or components within the motor protector.
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, 2004 and granted February 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 10, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 10, 2026.
- 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.