Stable aqueous alfa interferon solution formulations
CA 2201749 C · Owner: Schering Corporation · Inventors: Kline, Douglas F.; Yuen, Pui-Ho C.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Stable aqueous solution formulations containing alfa-type interferon e.g. interferon alfa-2a and interferon alfa-2b a buffer to maintain the pH in the , range of 4.5-7.1 polysorbate 80 as a stabilizer, edetate disodium as a chelating agent, sodium chloride as a tonicity agent and m-cresol as an , antimicrobial preservative and which maintain high chemical physical and , biological stability of the alfa-type interferon for an extended storage period of at least 24 months are disclosed.
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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 October 10, 1995 and granted June 15, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 10, 2015.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 10, 2017.
- 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.