Expired Canadian patentCanada
Controlled release verapamil tablet
CA 2092287 C · Owner: Baichwal, Anand R. · Inventors: Staniforth, John N.; Baichwal, Anand R.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Controlled release verapamil tablets are disclosed. The tablets include an excipient having a hydrophilic material prefer-, ably containing a mixture of xanthan gum/locust bean gum and an inert diluent.
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 July 2, 1992 and granted March 25, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 2, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 2, 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.
FiledJuly 2, 1992
GrantedMarch 25, 1997
Term endedJuly 2, 2012
Patent numberCA 2092287 C
Classification (IPC)A61K31/27 +2 more
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.