Benzothiazine derivatives
CA 1102802 A · Owner: Thomae (Dr. Karl) G.M.B.H. · Inventors: Engel, Wolfhard; Seeger, Ernst; Engelhardt, Gunther
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to new 4-hydroxy-2H-1,2benzothiazine-3-carboxamide-1,1-dioxide derivatives which possess interesting pharmacological properties and in particular, in general, a good antiphlogistic activity and compatibility. Processes for the preparation of these compounds are described and exemplified. Examples of pharmaceutical compositions containing the new compounds are also given.
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 June 9, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 1998.
- 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.