Substance trehalostatin and process for the preparation thereof
CA 2028117 C · Owner: Shin, Takashi · Inventors: Shin, Takashi; Murao, Sawao
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to a novel substance Trehalostatin which is a white powder soluble in water but hardly or only slightly soluble in hexane benzene, ethers, and petroleum ether, shows no absorption maxima at 220 nm or above in its ultraviolet visible light absorption spectrum is positive in Rydon-Smith reaction and negative in ninhydrin reaction, 3,6-dinitrophthalic acid reaction and Elson-Morgan reaction, has an Rf value of 0.37 in Merk Kieselgal 60 G254 thin layer chromatography using a 3:1:2 mixture of n-butanol, acetic acid and water as a developing solvent, and Rt of 11.0 minutes in YMC PA03 (0.7 x 27cm) high performance liquid chromatography using 65% v/v acetonitrile (in H2O) as …
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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 February 28, 1990 and granted August 1, 2000. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 28, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 28, 2012.
- 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.