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Expired Canadian patentCanada

Method and apparatus for extravascular treatment of blood

CA 1108129 A · Owner: Awad, John A. · Inventors: Lupien, Paul J.; Moorjani, Sital; Awad, John A.

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Abstract From the Canadian patent

There is provided an improved complex gel and apparatus for the extracorporeal treatment of blood of hyperlipemic and hypercholesteremic patients whereby a portion of blood is drawn from such patients and treated with a divalent metal complex of a sulphated polysaccharide coupled to a nonsulphated polysaccharide gel having its remaining sites blocked whereby a substantial amount of the lipoproteins present in the blood are bound to the gel and then filtering the blood before returning same to the patient.

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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 1, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 1, 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.
FiledJune 9, 1978
GrantedSeptember 1, 1981
Term endedSeptember 1, 1998
Patent numberCA 1108129 A
Classification (IPC)C08B37/02 +1 more

Timeline

Timeline From CIPO dates

1979198119831985198719891991199319951997Application filedJune 9, 1978Patent grantedSep 1, 1981Term endedSep 1, 1998

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