Method for purifying fibroblast growth factor protein
CA 2005154 A1 · Owner: Kawahara, Kenji · Inventors: Kawahara, Kenji; Kajio, Tomoko; Kato, Koichi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed is a method for purifying a fibroblast growth factor (FGF) protein with use of a crosslinked polysaccharide sulfate. The FGF protein is preferably a mutein, in which at least one human basic FGF-constituent amino acid is substituted by at least one different amino acid. The crosslinked polysaccharide sulfate is preferably a crosslinked cellulose sulfate, a crosslinked agarose sulfate or a crosslinked dextran sulfate. According to the present invention, FGF can be highly purified on a commercial scale, and pharmaceutical preparations containing the FGF protein can be advantageously formulated.
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 December 11, 1989. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 11, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 11, 2011.
- 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.