Bicyclic sulfonamide derivatives and process therefor
CA 1294974 C · Owner: Shionogi & Co. Ltd. · Inventors: Seno, Kaoru; Hagishita, Sanji
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Bioyclic sulfonamide derivatives represented by the forumula: (I), (wherein R1 is hydrogen or lower alkyl; R2 is lower alkyl aralkyl, or aryl which may be substituted by lower alkyl alkoxy, acetoxy, hydroxy, halogen, nitro or phenyl; and the wavy line indicates R or S configuration or their mixture) or their slate being used as antithrombotic, antivasoconstricting and, antibronchoconstricting drugs and the process therefor.
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
- Granted January 28, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 28, 2009.
- 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.