Programmed release tablets containing naproxen
CA 2105541 C · Owner: Marchi, Egidio · Inventors: Rotini, Leone Gabriele; Marchi, Egidio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Programmed release tablets, to be administered by oral route containing from, 500 to 1,200 mg of naproxen made by mixtures of an immediate release granulate dry compact containing from 5% to 28% of naproxen of a controlled release, granulate dry compact containing from 72% to 95% of naproxen and of a disintegrating agent. A portion of naproxen is released in a short time so that the drug can quickly, develop its therapeutic action reaching the necessary hematic levels while the, remaining portion is released in a longer interval of time so as to allow the, therapeutic coverage till the subsequent administration. The therapeutic coverage is effective for a period of 24 hours; thus the …
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 September 3, 1993 and granted January 5, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 3, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 3, 2015.
- 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.