Caprazene as a novel compound and derivatives thereof, and caprazol as a novel compound and derivatives thereof
CA 2514930 C · Owner: Shitara, Tetsuo · Inventors: Miyake, Toshiaki; Hamada, Masa; Shitara, Tetsuo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Caprazene and caprazol could be synthesized by hydrolysis of a caprazamycin. There could be synthesized a caprazene-1'''-amide derivative of the formula (II), (see formula II) and a caprazene-1'''-ester derivative of the formula (III) (see formula III), from caprazene. Further there could be synthesized a caprazol-1'''-amide derivative of the formula (V), (see formula V) and a caprazol-1" '- amide-3"'-ester derivative and a caprazol-3" '-ester derivative, etc. from caprazol. Furthermore an imidazolidinone derivative could be synthesized from the ring-opened product of the 1,4-diazepinone ring of caprazol. The novel caprazene derivative novel caprazol derivative , and novel …
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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 January 30, 2004 and granted August 7, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 30, 2024.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 30, 2026.
- 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.