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Expired Canadian patentCanada

Process for the production of blood-clotting factors and preparation of factors ii and vii, prepared by this process

CA 1206412 A · Owner: Behringwerke Aktiengesellschaft · Inventors: Preis, Hans M.; Schwinn, Horst; Heimburger, Norbert

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Abstract From the Canadian patent

A process for the production of a preparation which, is virtually free from the risk of transmitting hepatitis of blood-clotting factors II and VII by warming and, preparations of these clotting factors obtained in this way are described; In this process, the preparation is warmed in the presence of a chelating agent and if, appropriate, an aminoacid and/or a saccharide or sugar alcohol.

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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 June 24, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 24, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 20, 1981
GrantedJune 24, 1986
Term endedJune 24, 2003
Patent numberCA 1206412 A
Classification (IPC)A61K35/14 +2 more

Timeline

Timeline From CIPO dates

19821985198819911994199720002003Application filedNov 20, 1981Patent grantedJune 24, 1986Term endedJune 24, 2003

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