Carbostyril derivative and process for preparing same
CA 1259074 A · Owner: Tanabe Seiyaku Co. Ltd. · Inventors: Tsunashima, Akira; Ikezawa, Katsuo; Takaiti, Osasi
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention is directed to compounds of the formula:, (I), wherein YO is a protected hydroxy group and a process for preparing the same. These compounds are intermediates useful in the preparation of carbostyril derivatives which show potent bronchodilating activity and are useful as bronchodilators.
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 September 5, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 5, 2006.
- 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.