Carbohydrate derivatives comprising a trisaccharide unit
CA 2040905 C · Owner: Sanofi S.A. · Inventors: Petitou, Maurice; Van Boeckel, Constant A. A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Carbohydrate derivatives comprising a trisaccharide unit having the general formula I, (see formula I) in which R is alkyl, aryl, or aralkyl: Q is alkyl, aryl, aralkyl, or SO3-:, A and B are independently selected from hydrogen alkyl, aryl, aralkyl, or a carbohydrate group; and the charged moieties are compensated by counterions. The carbohydrate derivatives of this invention possess anti-thrombotic activity, and especially they have potent anti-X a activity without activating thrombin via anti-thrombin-III (AT-III) and smooth muscle cell proliferation inhibiting activity.
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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
- Filed April 22, 1991 and granted November 20, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 22, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2013.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Timeline
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Sources & verification
Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.