Use of peg-derivatized lipids as surface stabilizers for nanoparticulate compositions
CA 2362508 C · Owner: Gottardy, Greta A. · Inventors: Gottardy, Greta A.; Liversidge, Elaine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Nanoparticulate compositions comprising an insoluble organic drug and at least one polyethylene glycol-derivatized lipid adsorbed on the surface of the drug are described. The polyethylene glycol-derivatized lipid can be a PEGphospholipid, PEG-cholesterol, PEG-cholesterol derivative PEG-vitamin A, PEG-, vitamin E, or a mixture thereof. The compositions have an effective average particle size of less than about 1 micron. The invention also describes methods of making and using such compositions.
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 February 14, 2000 and granted October 7, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 14, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 14, 2022.
- 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.