Derivatives of physiologically active substance ml-236b and process for production thereof
CA 1338017 C · Owner: Toshioka, Tadashi · Inventors: Endo, Akira; Inoue, Tsutomu; Yuasa, Masayuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A compound represented by the following general formula:, wherein R1 and R2 are the same or different and, represent a hydrogen or halogen, and ring-opened free acid, amides and salts thereof are provided. The present invention also provides a process for the production of the above-mentioned compound starting from the known compound ML-236B.
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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 January 30, 1996. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 30, 2013.
- 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
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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.