Method of stabilizing useful protein and useful protein composition
CA 2267210 C · Owner: Yamada, Katsushige · Inventors: Watanabe, Masatoshi; Yanai, Akira; Ito, Tsukasa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method for stabilizing useful proteins characterized by mixing the useful proteins with aqueous solutions of compounds having a fundamental structure of arabic acid; and stabilized useful protein compositions wherein the useful proteins contain compounds having a fundamental structure of arabic acid. It is preferable to use acacia as the compounds having a fundamental structure of arabic acid while the useful proteins are typified by cytokines. This method is particularly efficacious in stabilizing interferons. Also processes for producing and stabilizing canine interferon-.gamma. are disclosed in detail.
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 July 31, 1998 and granted August 9, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 31, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 31, 2020.
- 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.