2-nitroimidazole derivative, production thereof, and radiosensitizer containing the same as active ingredient
CA 2074533 C · Owner: Pola Chemical Industries, Inc. · Inventors: Suzuki, Akira; Suzuki, Toshimitsu; Mori, Tomoyuki
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention relates to a 2-nitroimidazole derivative represented by the following general formula (I): (see formula I), wherein R1, R2 and R3 may be the same or different from each other and mean individually a hydrogen atom or an aryl group, and a radiosensitizer containing the same. The compound (I) according to this invention has an excellent radiosensitizing effect and high safety so that a, radiosensitizer containing the same is remarkably useful in the radiotherapy of cancers.
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
- Filed January 24, 1991 and granted October 17, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended January 24, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by January 24, 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
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.