Homogeneous immune interferon fragment
CA 1298219 C · Owner: F. Hoffmann-La Roche Ag · Inventors: Honda, Susumu; Sugino, Hiromu; Kung, Hsiang-Fu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for producing an active fragment of recombinant human immune interferon is disclosed which method comprises extracting transformed microorganisms capable of expressing immuna interferon after rupture of the cells in the absence of a protease inhibitor and purifying the extract obtained using monoclonal antibodies to immune interferon.
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
- Granted March 31, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 31, 2009.
- 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.