Haemoglobin-hydroxyethyl starch conjugates as oxygen carriers
CA 2258947 A1 · Owner: Sommermeyer, Klaus · Inventors: Eichner, Wolfram; Sommermeyer, Klaus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to novel oxygen carriers which contain haemoglobin-hydroxyethyl starch conjugates and a process for the preparation , thereof. The invention also relates to the use of said oxygen carriers as blood substitutes, plasma expanders, perfusion agents haemodilution agents , and/or cardioplegic solution. The object of the invention are oxygen carriers which contain a haemoglobin-hydroxyethyl starch conjugate in which the haemoglobin and the hydroxyethyl starch are linked selectively to each other via amide bonds between free amino groups of the haemoglobin and of the oxidised, reducing end group of the hydroxyethyl starch.
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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 July 7, 1997. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 7, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 7, 2019.
- 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
Timeline From CIPO dates
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.