Soluble salts of ibuprofen and naproxen with n-(2-hydroxyethyl) pyrrolidine and pharmaceutic compositions containing said salts
CA 2072407 A1 · Owner: Donati, Elisabetta · Inventors: Donati, Elisabetta; Lualdi, Paolo; Rapaport, Irina
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The salts, in the crystalline form of ibuprofen and naproxen with, N-(2-hydroxyethyl) pyrrolidine are prepared by dissolving ibuprofen and naproxen respectively in a suitable organic solvent by adding, N-(2-hydroxyethyl) pyrrolidine by letting the compounds react, by, removing the solvent and by crystallizing the obtained salt from a solution in an apolar and aprotic solvent. Said salts have a high solubility in water and are used for preparing pharmaceutic compositions for oral and other administrations.
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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 June 25, 1992. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended June 25, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 25, 2014.
- 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.