Sustained release pharmaceutical tablet
CA 2018167 C · Owner: Erbamont Inc. · Inventors: Boyd, Brian K.; Agrawala, Prafulla; Palepu, Nageswara R.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A sustained release solid composition for delivering an amount of a pharmaceutical material particularly magnesium lactate, to the gastro-intestinal tract comprising:, an active pharmaceutical powder material; a compressibility aid material for improving the compressibility of said pharmaceutical powder material; a first solid water soluble and/or swellable hydrophilic polymer; and, microcrystalline cellulose to enable said active pharmaceutical material to be gradually released in the gastro-intestinal tract over a period of time; said solid composition being compressed in tablet form, and a method for producing the tablets is disclosed.
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 June 4, 1990 and granted March 23, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended June 4, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by June 4, 2012.
- 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.