Process for producing benzoxazine derivative and production intermediate thereof
CA 2660917 C · Owner: Daiichi Pharmaceutical Co. Ltd. · Inventors: Okano, Katsuhiko; Nagai, Tomoyuki; Takayanagi, Yoshihiro
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process which is industrially advantageous in producing antibacterial agents. An industrially advantageous process for producing an intermediate useful in producing antibacterial agents is provided by producing compound (VI-a) in according with the following reaction schema: (see formula I)(see formula II-a)(see formula III-a)(see formula III-1-a) (see formula III-2-a)(see formula IV-a)(see formula IV-a)(see formula V-a) (see formula VI-a)(see formula VII-a). A process for producing the compound represented by the above formulae and production intermediates thereof.
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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
- Filed September 7, 2000 and granted January 3, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 7, 2020.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 7, 2022.
- 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.