Live bacterial vaccines against escherichia coli o157:h7
CA 2390304 A1 · Owner: Perry, Malcolm B. · Inventors: Conlan, J. Wayne; Perry, Malcolm B.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Disclosed are novel live bacterial vaccines against E. coli O157:H7 to treat , or prevent colonization of the gastrointestinal tract of a vertebrate by the pathogen. The vaccines comprise an effective amount of non-pathogenic bacteria naturally expressing the O157 antigen or a structural mimic thereof as a part of their lipopolysaccharide. In a preferred embodiment the non-pathogenic , bacteria are selected from bacterial strains of the genus Salmonella or Citrobacter. The vaccines of the invention are particularly useful in maintaining cattle herds free of E. coli O157:H7 and in reducing carriage and fecal shedding of E. coli O157:H7 prior to slaughter thus potentially , reducing the …
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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 10, 2000. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 10, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 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.