Compositions comprising the adjuvant qs-21 and polysorbate or cyclodextrin as exipient
CA 2654522 C · Owner: Antigenics Inc. · Inventors: Beltz, Gerald A.; Kensil, Charlotte A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Certain novel compositions of the adjuvant saponin QS-21 having improved properties are disclosed. The compositions of the present invention are designed (1) to minimize the lytic effects of QS-21 (2) to improve the tolerance of QS-21 containing formulations in humans or other animals (3) to stabilize the QS-21 from alkaline hydrolysis and/or (4) to maintain the high adjuvant potency of the QS- 21 product. These compositions may be employed with vaccines comprising proteins or peptides polysaccharides, lipids, or nucleic acids.
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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 August 28, 1998 and granted January 28, 2014. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 28, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 28, 2020.
- 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.