Multivalent hepatitis b virus vaccine
CA 2078358 A1 · Owner: Burke, Pamela · Inventors: Kniskern, Peter J.; Burke, Pamela; Hagopian, Arpi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In order to produce a mixture of different serotypes of hepatitis B virus (HBV) surface proteins in the form of particles, DNA encoding two or more HBV proteins were expressed by a single recombinant yea8t host. These HBV proteins display the antigenic sites genetically encoded by the S domain (including the preS domain) of the HBV virion envelope open reading frame and when expressed in a yeast host deficient in its ability to glycosylate contain, substantially reduced levels of entrapped carbohydrate when compared with HBsAg particles produced in yeast cells which are "wild-type" for glycosylation. These particles are useful as a vaccine for both the active and passive treatment or …
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 September 16, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended September 16, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 16, 2014.
- 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.