Pyrrol-3-carboxylic acids with central analgesic activity
CA 1215377 A · Owner: Poli Industria Chimica S.P.A. · Inventors: Massaroli, Giangiacomo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to novel pyrrol-3-carboxylic acids having the general formula (I):, (I) wherein R is CH3, n-C4H9, benzyl or o-chlorobenzyl R1 is, Cl, CH3 or OCH3, R2 is H or Cl, and R3 is H or Cl with the, proviso that when R is CH3 and R2 = R3 = H then R1 is other, than chlorine, as well as to the pharmaceutically acceptable salts thereof with inorganic cations and derivatives of nontoxic, pharmaceutically acceptable organic bases. The compounds of the formula (I) have central analgesic activity.
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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
- Granted December 16, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 16, 2003.
- 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.