Novel derivatives of 2,3-dihydro-benzofuranols
CA 2132829 C · Owner: Petty, Margaret A. · Inventors: Petty, Margaret A.; Grisar, J. Martin; Bolkenius, Frank
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Derivatives of 2,3-dihydro-5-benzofuranol intermediates thereof, and processes useful for their preparation. These compounds are free radical scavengers and are useful in the treatment of conditions capable of being treated by free radical scavengers, such as stroke, nervous system trauma and reperfusion damage.
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 March 10, 1993 and granted January 26, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 10, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 10, 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.