Expired Canadian patentCanada
Crystalline r-h-gm-csf and method for the preparation
CA 2058441 C · Owner: Trotta, Paul P. · Inventors: Hammond, Gerald S.; Le, Hung V.; Nagabhushan, Tattanahalli L.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention provides a crystalline form of recombinant human granulocyte-macrophage colony-stimulating factor (r-h-GM-CSF), and methods for making such crystals.
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 June 4, 1990 and granted December 16, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2012.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJune 4, 1990
GrantedDecember 16, 1997
Term endedJune 4, 2010
Patent numberCA 2058441 C
Classification (IPC)C07K14/53 +1 more
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.