Catalyst compositions
CA 1333619 C · Owner: Shell Canada Limited · Inventors: Wife, Richard Lewin; Van Doorn, Johannes Adrianus
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Novel catalyst compositions, characterized in that they are based upon, a) a palladium compound b) an anion of an acid with a pKa of less than 6 and, c) a compound of the general formula R1R2M1-R6-M2R3R4 wherein M1 and M2 represent similar or different elements chosen from the group made up of arsenic antimony, phosphorus and nitrogen, wherein R1 R2, R3 and R4 represent similar of different hydrocarbon groups which may optionally be substituted with polar groups and wherein R6 is a bivalent bridging group in which the bridge contains only three carbon atoms, the middle carbon atom of which forms part of a -CR7R8- group in which R7 and R8 are similar or different monovalent substituents …
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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
- Granted December 20, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 20, 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.