Expression of immunogenic hepatitis b surface antigens in transgenic plants
CA 2357004 A1 · Owner: Arntzen, Charles Joel · Inventors: Richter, Elizabeth; Mason, Hugh S.; Thanavala, Yasmin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Plant expression vectors comprising at least two expression cassettes are provided which function to reduce transcriptional silencing of polynucleotide expression. Further, novel plant expression vectors for expression of immunogenic polypeptides, including HBsAg are provided. The plant expression , vectors can be used to produce immunogenic polypeptides including HBsAg, in , edible plant tissues. The edible plant tissues can be used to elicit an immune response in humans and animals when the plant tissues are consumed.
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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 December 23, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended December 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 23, 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.