Process for the preparation of a nickel/phosphorus ligand catalyst for olefin hydrocyanation
CA 2468293 A1 · Owner: Chu, Luis A. · Inventors: Mckinney, Ronald J.; Herron, Norman; Chu, Luis A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing a hydrocyanation catalyst comprising contacting a bidentate phosphorous-containing ligand with a nickel chloride in the presence of a nitrile solvent and a reducing metal which is more electropositive than nickel. Preferably, the nickel chloride is dried before use.
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 November 14, 2002. No grant is recorded for it in Canada; had it been granted, its 20-year term would have ended November 14, 2022.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by November 14, 2024.
- 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.