Vaccine preparations containing attenuated toxin
CA 2348658 C · Owner: Watanabe, Koji · Inventors: Watanabe, Koji; Omura, Satoshi; Sato, Taka-Aki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Described herein are adjuvants containing as the active ingredient an attenuated toxin having a residual activity of at least 1/2000 the activity of the natural toxin and vaccines containing such adjuvants. By using, for example, attenuated natural cholera toxin vaccines capable of showing sufficient immune potentiation in percutaneous vaccination or nasal vaccination can be presented.
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 October 20, 1999 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 20, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 20, 2021.
- 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.