Impeller for centrifugal pumps
CA 1286151 C · Owner: Weir Minerals Australia Ltd · Inventors: Walker, Craig Ian
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A centrifugal slurry pump impeller has auxiliary vanes on at least one side surface thereof. An annular projection joins the vanes at or adjacent the periphery of the impeller and there, is at least one further projection such as a concentric annular projection extending between adjacent auxiliary vanes.
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
- Granted July 16, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended July 16, 2008.
- 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.