Wide pore alumina supports
CA 1260912 A · Owner: Shell Canada Limited · Inventors: Slaugh, Lynn H.; Schoenthal, Galeon W.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A process for preparing a high surface area wide-pore-, containing, porous alumina material which comprises: a) preparing a first alumina hydrogel by precipitating an aqueous solution of aluminium nitrate with an aqueous solution of an alkali metal or ammonium carbonate or bicarbonate then, washing said first hydrogel, b) separately preparing a second alumina hydrogel by precipitating an aqueous solution of sodium aluminate with an aqueous solution of a strong inorganic acid, then washing said second hydrogel, c) co-mulling the washed first and second hydrogels in the presence of a peptizing agent, wherein the weight percentage of the alumina provided by the first hydrogel ranges from 10 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
- Granted September 26, 1989. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 26, 2006.
- 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.