Catalysts for the aromatization of light paraffins and olefins
CA 2047979 C · Owner: Le Van Mao, Raymond · Inventors: Le Van Mao, Raymond; Yao, Jianhua
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
In accordance with the present invention there is now provided a, hybrid catalyst suitable for the aromatization of light paraffins and olefins comprising a mixture of a pentasil type zeolite having the structure of ZSM-5 orZSM-11 and a cocatalyst consisting of gallium oxide supported by an oxide selected from the group consisting of silica, alumina particles and chromium oxide particles.
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 July 26, 1991 and granted October 21, 1997. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended July 26, 2011.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by July 26, 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.