Phospholipid nucleosides
CA 2004695 C · Owner: Hertel, Larry Wayne · Inventors: Grindey, Gerald Burr; Bonjouklian, Rosanne; Hertel, Larry Wayne
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Phospholipids of 2'-deoxy-2',2'-difluoronucleosides, where the phosphorus-containing moiety is linked to the 5'-oxygen of the nucleoside are useful, antineoplastic agents. A process for improved phosphorylation of the nucleosides uses a large excess of POCl3.
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 6, 1989 and granted August 10, 1999. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 6, 2009.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by December 6, 2011.
- 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.