Oral sustained release pharmaceutical composition of beraprost sodium
CA 2525542 C · Owner: Toray Industries, Inc. · Inventors: Guerin, Emmanuel; Salle, Sandrine
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An oral sustained release pharmaceutical composition comprising a plurality of granules having diameters of not more than 1000 gm each of which comprises a , nucleus granule containing beraprost sodium and a coating agent constituting , at least two skin layers including (1) a skin layer containing a relatively water-insoluble macromolecular substance and (2) a skin layer containing a hotmelt low-melting substance, said nucleus granule being coated with said coating agent.
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 May 19, 2004 and granted January 10, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 19, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 19, 2026.
- 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.