Expired Canadian patentCanada
Filtration of hot water extraction process whole tailings
CA 1103184 A · Owner: Her Majesty The Queen, In Right Of The Province Of Alberta · Inventors: Liu, Joseph K.; Lane, Stephen J.; Cymbalisty, Lubomyr M.O.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Whole tailings are treated with a flocculant to cause fines to agglomerate with the coarse particles. The product is then vacuum filtered to separate the fines from the water.
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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
- Granted June 16, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 16, 1998.
- 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 20, 1978
GrantedJune 16, 1981
Term endedJune 16, 1998
Patent numberCA 1103184 A
Classification (IPC)C10G1/04
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.