Pyrroloquinoline compounds
CA 2023726 A1 · Owner: Matsuda, Hiroshi · Inventors: Manabe, Takashi; Matsuo, Masaaki; Fujii, Naoaki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Compounds of the formula:, in which R1 and R2 are each hydrogen or lower alkyl R3 is aryl or heterocyclic group, each of which may be substituted by suitable, substituent(s) R4 is hydrogen, halogen or lower alkyl A is methylene, methine, oxa, thia, sulfinyl or sulfonyl, Y is vinylene or ethylene Z is a group of the formula:, or , wherein R5 is carboxy or protected carboxy and, R6 is hydrogen or hydroxy-protective group, and, the line of ---- is a single or double bond and pharmaceutically acceptable salts thereof. A process for the preparation of these compounds pharma-, ceutical compositions containing them and the preparation thereof, and their uses for treating hypercholesterolemic and …
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 August 21, 1990. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended August 21, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 21, 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.