Expired Canadian patentCanada
Improved compositions of pegylated soluble tumor necrosis factor receptors and methods of preparing
CA 2490232 C · Owner: Amgen Inc. · Inventors: Shi, Lei; Kerwin, Bruce; Chang, Byeong
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides for improved compositions comprising a PEGsTNF- R1 which, in addition to having useful higher concentrations demonstrate , decreased viscosity (<400 cP) and improved stability.
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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 12, 2003 and granted November 25, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 12, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 12, 2025.
- 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 12, 2003
GrantedNovember 25, 2014
Term endedJune 12, 2023
Patent numberCA 2490232 C
Classification (IPC)A61K38/19 +2 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.