Pentaerythritol lipid derivatives
CA 2325849 A1 · Owner: Aberle, Alfred M. · Inventors: Aberle, Alfred M.; Nantz, Michael H.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to pentaerythritol lipid derivatives which are useful for the intracellular delivery of polynucleotides. These cationic lipids are useful in the preparation of liposomes and other lipid vesicles for the delivery of nucleic acids into mammalian cells.
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 April 2, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended April 2, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 2, 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.