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Expired Canadian patentCanada

Solids-liquids separator

CA 2001470 C · Owner: Richard Mozley Limited · Inventors: Mozley, Richard Henry

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

A centrifugal solids-liquids separator comprises a rotatable hollow centrifuge drum at least a part of which is tapered, and which is rotatable about its axis means for introducing a slurry of solids and liquids to be separated at a point along the length of the drum spaced from a wider end so that rotation of the drum tends to cause migration of the slurry towards the said wider end, and scraper conveyor means rotatable about an axis coincident with that of the drum and at a relative speed which is low in relation to the absolute speed of the drum, the scraper conveyor means being so mounted that they act in direct contact with the inside surface of the drum so as to displace solids …

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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

  • Filed October 25, 1989 and granted November 26, 1996. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 25, 2009.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 25, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledOctober 25, 1989
GrantedNovember 26, 1996
Term endedOctober 25, 2009
Patent numberCA 2001470 C
Classification (IPC)B04B11/08 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedOct 25, 1989Patent grantedNov 26, 1996Term endedOct 25, 2009

Sources & verification

Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.