Expression system
CA 2413045 C · Owner: Bullifent, Helen Lisa · Inventors: Williamson, Ethel Diane; Holden, Paula Thomson; Bullifent, Helen Lisa
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An immunogenic reagent which produces an immune response which isprotective against Bacillus anthracis, said reagent compr ising one or more polypeptides which together represent up tothree domains of the full length Protective Antigen (PA) of B . anthracis or variants of these and at least one of said , domains comprises domain 1 or domain 4 of PA or a variant thereof.The polypeptides of the immunogenic reagent as well as full length PA are produced by expression from E. coli. High yields of polypeptide are obtained using this method. Cells,vectors and nucleic acids used in the method are also describedand claimed.
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 6, 2001 and granted June 21, 2016. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 6, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 6, 2023.
- 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.