1-phenyl-4-acetoxy-1,2-dihydroquinolin-2-one compounds and processes for their preparation
CA 1099721 A · Owner: Merck Patent Gesellschaft Mit Beschraenkter Haftung · Inventors: Lissner, Reinhard; Schacht, Erich; Dahm, Hans
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
New quinolone derivatives of the Formula I I, wherein R1 is H and R2 is Cl, CF3 or CH3O especially where, R1 is H and R2 is CF3 or CH3O at the para-position or a, physiologically acceptable acid addition salt thereof possess, pharmacological properties including thrombocyte aggregation inhibiting action. These compounds may be prepared by reaction of an anthranilic acid derivative with acetic acid anhydride, or a quinoline derivative with acetic acid.
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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 April 21, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 21, 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.