Vaccine accelerator factor (vaf) for improvement of vaccinations in poultry
CA 2522614 C · Owner: Schweitzer Chemical Corporation, Ltd. · Inventors: Kuo, Tsun-Yung
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides a vaccine accelerator factor (VAF) which is an in ovo nucleotide immuno-stimulant. The VAF contains one or more DNA constructs, each having a DNA molecule and a vector. Each of the DNA molecule contains one or more genes or gene fragments each encoding an antigenic , peptide of an avian virus. The VAF is preferably administered to the amniotic fluid of an egg after being fertilized for about 17-19 days. The VAF can be coadministered with a viral vaccine containing one or more attenuated or inactive avian viruses. Alternatively, the VAF can be administered prior to the administration of the viral vaccine which is administered at hatch or , post-hatch. 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 May 6, 2004 and granted May 21, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 6, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 6, 2026.
- 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
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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.