Recombinant toxin a/toxin b vaccine against clostridium difficile
CA 2365915 C · Owner: Moncrief, J. Scott · Inventors: Moncrief, J. Scott; Wilkins, Tracy D.; Zheng, Limin
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 the field of medical immunology and further to pharmaceutical compositions, methods of making and methods of use of vaccines. More specifically this invention relates to recombinant proteins derived from the genes encoding Clostridium difficile toxin A and toxin B and , their use in an active vaccine against C. difficile.
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 April 10, 2000 and granted November 24, 2015. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 10, 2022.
- 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.