Cross-protective salmonella vaccines
CA 2072633 A1 · Owner: Washington University · Inventors: Munson, Maryann; Curtiss, Roy Iii
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Vaccines are provided for treatment of individuals for infections by gram negative bacteria. The vaccines are comprised of live avirulent Salmonella which are able to induce immunity to homologous and to heterologous Salmonella serotypes and to other , gram-negative enteric bacteria. The Salmonella of which the vaccine is comprised possess at least one mutation in a gene which globally regulates other genes, and which also possess a mutation in at least one other of the following type: a mutation either in a gene encoding an enzyme in a lipopolysaccharide synthesis which results in a reversibly rough phenotype; or in a gene which regulates the synthesis of iron-regulated OMPs such that …
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 November 2, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 2, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 2, 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.