Isochroman compounds and their production process
CA 2291931 C · Owner: Tonai, Hiroko · Inventors: Hirai, Hideo; Ichiba, Toshio; Tonai, Hiroko
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
This invention relates to the isochroman compound of formula (I) (see above formula), and its pharmaceutically acceptable salts which are useful as an amyloid , aggregation inhibitor and for treating Alzheimer's disease. This invention also relates to processes for producing the isochroman compound which comprises cultivating, Penicillium simplicissimum FERM BP-6357 and then isolating the isochroman compound from the fermentation broth. The present invention also relates to a pharmaceutical composition comprising the isochroman compound.
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 December 8, 1999 and granted December 30, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 8, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 8, 2021.
- 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.