Escherichia coli vaccine
CA 2022420 C · Owner: Akzo N.V. · Inventors: Van Den Bosch, Johannes F.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
According to the present invention it has been found that a novel E. coli toxin or an immunogenic fragment thereof can be used in the preparation of vaccines for warm-blooded animals, and in particular for birds. Said toxin is found to be associated in flagellar structures attached to the bacteria, and these flagella or the free toxins can, after inactivation be used to immunize animals against E. coli infections.
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 August 1, 1990 and granted March 28, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 1, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 1, 2012.
- 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.