Non-hydrated gabapentin polymorph, a process for the preparation thereof and the use therefor for the preparation of pharmaceutical grade gabapentin
CA 2333408 A1 · Owner: Garcia Cruz, Rafael · Inventors: Molins Grau, Elias; Bosch Llado, Jordi; Onrubia Miguel, Maria Del Carmen
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The non-hydrated gabapentine polymorph is obtained by desiccating by atomization or turbodrying an aqueous solution of gabapentine; the invention also relates to its use in order to obtain gabapentine appropriate for pharmaceutical use; disclosed is a method which comprises subjecting the polymorph to a crystallization process in solvents.
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 10, 1999. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended May 10, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 10, 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.