6,7-dihydroxy-isoquinoline derivatives
CA 1296012 C · Owner: Otake, Norikazu · Inventors: Ushijima, Ryosuke; Otake, Norikazu; Nakagawa, Susumu
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The compound having the formula: wherein R is a straight chain, branched chain or cyclic lower alkyl, a lower alkenyl or a lower alkynyl group which may be substituted by a carboxyl group and R1 is, hydrogen atom or an acetyl group; or a pharmaceutically acceptable salt, physiologically hydrolyzable ester or solvate thereof, processes for the preparation thereof and an antibacterial agent containing it. Also disclosed are a compound having the formula:, wherein R6 is a hydrogen atom or an alkanoyl group or a, salt thereof and a process thereof.
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 February 18, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 18, 2009.
- 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.