Method and apparatus for preparing an acellular red blood cell substitute
CA 2250274 C · Owner: Dewoskin, Richard E. · Inventors: Dewoskin, Richard E.; Doubleday, Marc D.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process is disclosed for the preparation of an essentially tetramer-free substantially stroma-free, polymerized pyridoxylated, hemoglobin. Also disclosed is an essentially tetramer-free substantially , stroma-free, polymerized pyridoxylated hemoglobin product, capable of being infused into human patients in an amount of up to about 5 liters.
Read the whole patent
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 March 27, 1997 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 27, 2017.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 27, 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.