Methods for controlling sialic acid derivatives in recombinant glycoproteins
CA 2183552 C · Owner: Blumen, Tracy Kaye · Inventors: Hettwer, David Joseph; Grampp, Gustavo E.; Blumen, Tracy Kaye
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to the effects of CO2 on the carbohydrate composition of a cell culture-derived recombinant glycoprotein. The methods of the invention demonstrate a practical method for controlling levels of a sialic acid derivative NGNA, in secreted recombinant, glycoproteins which will be useful in a variety of bioprocessing systems.
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 October 28, 1994 and granted February 8, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 28, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 28, 2016.
- 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.