Microemulsions with adsorbed macromolecules and microparticles
CA 2689696 C · Owner: Chiron Corporation · Inventors: Barackman, John; Kazzaz, Jina; Donnelly, John
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Microparticles with adsorbent surfaces methods of making such microparticles, and uses thereof are disclosed. The microparticles comprise a polymer such as a poly(.alpha.-hydroxy acid), a polyhydroxy butyric acid a polycaprolactone, a polyorthoester, a polyanhydride and the like, and are formed using cationic anionic, or nonionic detergents. The surface of the microparticles efficiently adsorb biologically active macromolecules such as DNA, polypeptides, antigens, and adjuvants. Also provided are compositions of an oil droplet emulsion having a metabolizable oil and an emulsifying agent. Immunogenic compositions having an immunostimulating amount of an antigenic substance and an …
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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 February 9, 2000 and granted August 6, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 9, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 9, 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
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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.