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Expired Canadian patentCanada

Cationized antibodies for delivery through the blood-brain barrier

CA 1309340 C · Owner: Alkermes · Inventors: Pardridge, William M.; Schimmel, Paul R.

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

Abstract of the Disclosure, The rate of trancytosis of antibodies across the blood-brain barrier is increased by cationizing the antibodies to provide cationized antibodies having an isoelectric point of between about 8.0 to 11Ø The increased rates of transport across the blood-brain barrier makes such cationized antibodies useful for both neurodiagnostic and neuropharmaceutical purposes. Methods for preparing such cationized antibodies are disclosed.

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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 October 27, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 27, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 16, 1988
GrantedOctober 27, 1992
Term endedOctober 27, 2009
Patent numberCA 1309340 C
Classification (IPC)A61K49/00 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedAug 16, 1988Patent grantedOct 27, 1992Term endedOct 27, 2009

Sources & verification

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