Process for the preparation of a dehydrogenation catalyst and the use thereof
CA 2077009 C · Owner: Shell Canada Limited · Inventors: Hamilton, David M. Jr.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The instant invention relates to a process for the preparation of an improved dehydrogenation catalyst made up of iron oxide and potassium oxide by combining an iron-containing compound made up of from 10% to 100% by weight of a micaceous iron oxide and a potassium-containing compound to form a pellet followed by, calcination, and to the use of the catalyst for the non-oxidative dehydrogenation in the presence of steam of hydrocarbons in, particular the dehydrogenation of ethylbenzene to styrene.
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 August 27, 1992 and granted September 16, 2003. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended August 27, 2012.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by August 27, 2014.
- 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.