Drug material suitable for micronisation
CA 2099586 C · Owner: Beach, Steven Frederick · Inventors: Beach, Steven Frederick; Roberts, Tony Gordon; Latham, David William Stuart
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
1-Hydroxy-2-naphthalene carboxylate (hydroxynaphthoate)salt of 4-hydroxy-a1- 6-(4-phenylbutoxy)hexylaminome-, thyl-1,3-benzenedimethanol in the form of spherical accretions. of microcrystals, the spherical accretions being free-flowing friable and micronisable and preferably having a mean particle size from 70 to 300 mm and a mean surface area from 4 to 12 m2g-1. The hydroxynaphthoate salt (in the claimed form) may be prepared by quenching a hot organic/aqueous organic solution containing the salt with a cold organic/aqueous organic solvent.
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 November 28, 1991 and granted June 25, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended November 28, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 28, 2013.
- 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.