Process for the preparation of rhus verniciflua extract and anti-cancer composition containing same
CA 2235565 C · Owner: Forest Genetics Research Institute · Inventors: Na, Eun-Sun; Jung, Nam-Chul; Na, Chun-Soo
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
An anti-cancer composition comprising an effective amount of a Rhus verniciflua extract and a pharmaceutically acceptable carrier, the Rhus verniciflua extract being prepared by a process comprising extracting from Rhus verniciflua a crude extract with acetone or ethanol and, subjecting the crude extract to silica gel adsorption chromatography employing a mixture of chloroform and methanol.
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 April 22, 1998 and granted December 4, 2001. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 22, 2018.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 22, 2020.
- 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.