Interferon-.beta. complex
CA 2536643 C · Owner: Narumi, Hideki · Inventors: Sone, Saburou; Tsushima, Yoshiaki; Narumi, Hideki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a complex between interferon-.beta. and polyethylene , glycol, which has high biological activity and to a method for producing the , complex at high efficiency. Namely, the present invention relates to a method for producing an interferon-.beta. , complex comprising binding interferon-.beta. to polyethylene glycol in the presence of at least one , additive selected from the group consisting of oligosaccharides having 5 or less sugar units, monosaccharides, their corresponding sugar alcohols and C2-6 polyhydric , alcohols, and to an interferon-.beta. complex produced by the method which has polyethylene , glycol specifically bound with lysine located …
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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 August 24, 2004 and granted November 12, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 24, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 24, 2026.
- 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.