Quino-benzothiazine antibacterial compounds
CA 1267649 C · Owner: Chu, Daniel Tim-Wo · Inventors: Chu, Daniel Tim-Wo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Quino-benzothiazine compounds having the formula: wherein R2 is one or more substituents R1 is a hydrogen or a, carboxy-protecting group Z is an amine group, pyridine or an, aliphatic heterocyclic group and W is halogen or hydrogen or alternatively, W and Z together form a methylenedioxy bridge. The compounds have antibacterial activity.
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 April 10, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended April 10, 2007.
- 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.