Expired Canadian patentCanada
Destabilization and improvement in permeability and shear strength of sludge treated with hydrolyzed starch flocculant and portland cement
CA 1109408 A · Owner: Suncor Inc. · Inventors: Yong, Raymond N.
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 treatment for a tar sands tailing pond is disclosed whereby an increase in shear strength and permeability of a sludge layer within the pond is attained. The treatment comprises the combined application of potato starch flocculant and Portland cement.
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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 September 22, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 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.
FiledJanuary 30, 1978
GrantedSeptember 22, 1981
Term endedSeptember 22, 1998
Patent numberCA 1109408 A
Classification (IPC)C10G1/04 +2 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.