Arylsulphonamides
CA 2016646 C · Owner: Nickl, Josef (Deceased) · Inventors: Weisenberger, Johannes; Meade, Christopher; Eisert, Wolfgang
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Arylsulphonamides of formula I, (wherein A B and R1 to R6 are as defined in claim 1) the enantiomers, cis- and trans-isomers, and addition salts thereof, have useful pharmacological properties particularly antithrombotic activities and thromboxane-mediating activities. Furthermore, the new compounds are also thromboxane antagonists (TRA) and thromboxane synthesis inhibitors (TSH). They also have an effect on PGE2 production.
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 May 11, 1990 and granted September 7, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended May 11, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by May 11, 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.