Porous membrane of sinterable refractory metal oxides or silica
CA 1269404 C · Owner: Alcan International Limited · Inventors: Jain, Mukesh K.; Nadkarni, Sadashiv K.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to porous membranes made of sintered silica or refractory metal oxides e.g. alumina, titania, zirconia, tungsten oxide etc. and to a process, for their formation. The membranes are formed by dispersing a powder of the metal oxide or silica in an organic polymer. The relative amount of silica or metal oxide to polymer is such that, after the polymer has been carbonized in a subsequent step, there is a stoichiometrical excess of the oxide to carbon. The solution is then shaped to form a desired thin membrane, and the polymer is then carbonized by heating it in a non-oxidizing atmosphere. The resulting oxide/carbon product is heated to a temperature at which (a) the …
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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 May 22, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 22, 2007.
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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.