Pyridothiadiazines; process for preparing the same and pharmaceutical compositions containing them
CA 2119853 C · Owner: De Tullio, Pascal · Inventors: Masereel, Bernard; Pirotte, Bernard; Delarge, Jacques
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention concerns compounds of formula (I): (see formula I) in which R1 represents a group selected among ~ hydrogen ~R3, with R3 representing a radical selected among lower alkyl lower alkenyl and lower alkynyl, R3 being substituted or not ~cycloalkyl, ~substituted cycloalkyl, lower cycloalkylalkyl substituted lower cycloalkylalkyl, lower alkyl lower alkoxycarbonyl, arylcarbonyl substituted or not on the aryl ring where R1 forms a double bond between atoms 3 and 4 of the thiadiazine cycle present in formula (I); - R2 represents a group selected among hydrogen R10, with R10 having the same definition as R3 above R10 being substituted or not, R11, with R11 representing a group selected …
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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 24, 1994 and granted September 10, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended March 24, 2014.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by March 24, 2016.
- 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.