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Expired Canadian patentCanada

Membranes with low protein adsorbability

CA 1312508 C · Owner: Pall Corporation · Inventors: Gsell, Thomas C.

CIPO record

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Abstract From the Canadian patent

A porous polymeric medium having low protein affinity is provided comprising a porous polymeric substrate and a polymer coating having a low affinity for amide group-containing materials formed in situ at the surface of the porous polymeric substrate from a polymer having a plurality of hydroxyl groups and a cross-linking agent having functional groups which react with the hydroxyl groups.

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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 January 12, 1993. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 12, 2010.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 9, 1987
GrantedJanuary 12, 1993
Term endedJanuary 12, 2010
Patent numberCA 1312508 C
Classification (IPC)B01D71/56 +2 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedDec 9, 1987Patent grantedJan 12, 1993Term endedJan 12, 2010

Sources & verification

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