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Expired Canadian patentCanada

Feed accelerator system including accelerator disc

CA 2124440 C · Owner: Baker Hughes Incorporated · Inventors: Leung, Woon Fong; Shapiro, Ascher H.

CIPO record

Overview

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

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Abstract From the Canadian patent

A feed accelerator system for use in a centrifuge comprising a concentrically mounted accelerator (28) including a plurality of spaced disc members (29 41), one disc including a target surface (37) having no sharp bends, and a feed pipe (34) discharging near the target surface (37). The disc members (29, 41) having vanes (39) therebetween forming a plurality of feed channels. The above parts interrelated to provide minimum feed splashback, uniform feed distribution and circumferential flow uniformity, maximum feed acceleration and maximum centrifuge separation efficiency.

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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 November 20, 1992 and granted February 24, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 20, 2012.
  • A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 20, 2014.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 20, 1992
GrantedFebruary 24, 1998
Term endedNovember 20, 2012
Patent numberCA 2124440 C
Classification (IPC)B04B11/02 +2 more

Timeline

Timeline From CIPO dates

1993199519971999200120032005200720092011Application filedNov 20, 1992Patent grantedFeb 24, 1998Term endedNov 20, 2012

Sources & verification

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