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Expired Canadian patentCanada

Separating constituents of a mixture of particles

CA 1332819 C · Owner: Whitlock, David R. · Inventors: Whitlock, David R.

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

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Abstract From the Canadian patent

The specification describes specie-separating and concentration-enhancing methods and apparatus which operate on a substantially continual basis. The constituents of a mixture are separated according to their respective influencability by motion in the direction of a separation influence and the species of like net influencability are transported in substantially continuous streams, each of opposite net influencability running near each other in a, direction or directions transverse to the separation influence the streams, being in communication parallel to the separation influence so as to transfer at least one of the separable species from one stream to another stream by virtue of …

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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 November 1, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 1, 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.
FiledMarch 29, 1989
GrantedNovember 1, 1994
Term endedNovember 1, 2011
Patent numberCA 1332819 C
Classification (IPC)B03C3/00 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMarch 29, 1989Patent grantedNov 1, 1994Term endedNov 1, 2011

Sources & verification

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