Catalysts and process for the production of linear polyamines
CA 2107968 C · Owner: Union Carbide Chemicals & Plastics Technology Corporation · Inventors: Doumaux, Arthur Roy, Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst composition for the condensation of alcohols with amines to produce an enhanced ratio of acyclic polyamines to other reaction products comprising a reaction product of: (a) high surface area metal oxides or metal oxide precursors or, mixtures thereof, of metals selected from the group consisting of Groups 3, 4, 5, 6, 8, 12 13, 14 and 15, of the Periodic Table, (b) a phosphorous component and (c) metal oxides or metal oxide precursors or, mixtures thereof, of metals selected from the group consisting of Groups 1, 2, and 3 of the Periodic Table.
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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
- Filed October 7, 1993 and granted June 30, 1998. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 7, 2013.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 7, 2015.
- 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.