Dimerization process and catalysts therefor
CA 2040366 C · Owner: Phillips Petroleum Company · Inventors: Drake, Charles A.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Catalyst supports, catalyst systems, methods for the preparation thereof, in dimerization processes therewith are provided. Catalyst supports are prepared from alkali metal carbonate at least one low surface area, silica-alumina and a liquid. Catalyst systems comprised of at least one elemental alkali metal deposited on the catalyst support. Optionally the, catalyst system further comprises of at least one promoter.
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 12, 1991 and granted December 2, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 12, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 12, 2013.
- 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.