Process for the separation of crystalline silicates
CA 1181570 A · Owner: Shell Canada Limited · Inventors: Van Erp, Willibrord A.; Velthuis, Otto M.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
Fine-crystalline silicates can be separated by filtration from an aqueous mother liquor, if this liquor contains at least 30%v (based on the mixture) of a water-miscible monohydric alcohol, ketone, sulphoxide and/or cyclic ether having at most 5 carbon atoms per molecule.
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
- Granted January 29, 1985. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended January 29, 2002.
- 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.