Aromatic conversion processes and catalysts useful therein
CA 2028935 C · Owner: Merrill, James T. · Inventors: Butler, James R.; Shamshoum, Edwar; Merrill, James T.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Aromatic conversion processes and catalysts useful therein and their preparation including alkylation and transalkylation processes involving alkylation of an aromatic substrate with a C2-C4 alkylating agent with recovery of a monoalkylated aromatic product and liquid phase transalkylation of a polyalkylated product. Specifically, a benzene feedstock is supplied to an alkylation zone operated under liquid or vapor phase conditions with the output supplied to the transalkylation zone operated under lower temperature liquid phase conditions. In aromatic conversion processes over molecular sieve catalysts such as zeolite Y or beta under liquid phase conditions an aro-, matic feedstock …
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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 30, 1990 and granted May 14, 2002. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended October 30, 2010.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by October 30, 2012.
- 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
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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.