Tocopherols, tocotrienols, other chroman and side chain derivatives and uses thereof
CA 2345079 C · Owner: Israel, Karen · Inventors: Gardner, Robb; Hurley, Laurence; Yu, Weiping
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The present invention provides an antiproliferative compound having structural formula (I), wherein X is oxygen, nitrogen or sulfur; R1 is alkyl alkenyl, alkynyl, aryl, heteroaryl, carboxylic acid carboxylate, carboxamide, ester, thioamide thiolacid, thiolester, saccharide, alkoxy-linked saccharide amine, sulfonate, sulfate, phosphate, alcohol ethers and nitriles; R2 is hydrogen, methyl benzyl carboxylic acid, benzyl carboxylate benzyl carboxamide, benzylester, saccharide and amine; R3 is selected from the group consisting of hydrogen, methyl, benzyl carboxylic acid benzyl carboxilate, benzyl , carboxamide benzylester, saccharide and amine; R4 is of methyl benzyl , carboxylic acid, benzyl …
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 September 23, 1999 and granted June 21, 2011. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended September 23, 2019.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by September 23, 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.