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Expired Canadian patentCanada

Process for the preparation of antitumoral glycoproteins modified on their carbohydrate units

CA 1248874 A · Owner: Societe Anonyme Styled: Sanofi · Inventors: Jansen, Franz; Gros, Pierre

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

The present invention relates to the preparation of glycoproteins by oxidation of their carbohydrate units with periodate ions. The resulting novel glycoproteins are useful as drugs and for the preparation of prolonged-action immunotoxins.

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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 17, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 17, 2006.
  • 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 13, 1985
GrantedJanuary 17, 1989
Term endedJanuary 17, 2006
Patent numberCA 1248874 A
Classification (IPC)C07K14/41 +2 more

Timeline

Timeline From CIPO dates

1986198919921995199820012004Application filedJune 13, 1985Patent grantedJan 17, 1989Term endedJan 17, 2006

Sources & verification

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