Catalysts with high cobalt surface area
CA 2677762 C · Owner: Lok, Cornelis Martinus · Inventors: Lok, Cornelis Martinus; Kelly, Gordon James; Gray, Gavin
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A catalyst or precursor thereto comprising cobalt and/or a cobalt compound on a , transition alumina support having a total cobalt content of at least 41 % by weight , and a cobalt surface area, after reduction greater than 25 m2 per gram of , total cobalt. The catalyst or precursor may be made by slurrying a transition alumina , powder having a pore volume of at least 0.7 ml/g with an aqueous cobalt ammine carbonate complex and heating the slurry to decompose the complex.
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 April 23, 2001 and granted January 17, 2012. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended April 23, 2021.
- A certificate of supplementary protection adds at most two years for a drug, so even that would have ended by April 23, 2023.
- 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.