Preparation of 1h-imidazo4,5-cquinolin-4-amines via1h-imidazo 4,5-cquinolin-4-phthalimide intermediates
CA 2493227 A1 · Owner: Teva Pharmaceutical Industries Ltd. · Inventors: Bianchi, Stefano; Mantovani, Silvia; Merli, Valeriano
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention provides 1H-imidazo(4,5-C) quinolin-4-phthalimide intermediates useful in the synthesis of 1H-imidazo(4,5-C) quinoline-4-amines particularly , Imiquimod. The invention further provides a method for making the intermediates and a method for making 1H-imidazo (4,5-C) quinoline-4-amines via the intermediates.
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 July 23, 2003. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended July 23, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 23, 2025.
- 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.