Silver-based catalyst and an epoxidation process using the catalyst
CA 2477069 C · Owner: Yeates, Randall Clayton · Inventors: Szymanski, Thomas; Yeates, Randall Clayton; Gerdes, William Herman
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst which comprises a carrier and silver deposited on the carrier which carrier has a surface area of at least 1 m2/g and a pore size , distribution such that pores with diameters in the range of from 0.2 to 10 ~m represent at least 70 % of the total pore volume and such pores together provide a pore volume of at least 0.27 ml/g relative to the weight of the , carrier; a process for the preparation of a catalyst which process comprises depositing silver on a carrier, wherein the carrier has been obtained by a method which comprises forming a mixture comprising: a) from 50 to 90 %w of a first particulate a-alumina having an average particle size (d50) of from more than 10 up to …
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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 February 25, 2003 and granted August 21, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended February 25, 2023.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by February 25, 2025.
- 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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Official CIPO records
Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.