Process for preparing amorphous silica from kimberlite tailing
CA 2592518 C · Owner: Barochiya, Dipti · Inventors: Chunawala, J. R.; Chandra, Suresh; Ghelani, Devendra
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A new process is described for the preparation of free flowing hydrated amorphous silica from kimberlite tailing - a waste in diamond mining. The process comprises treating of kimberlite with acid further reacting it with , alkali solution to obtain soluble metal silicate solution which is , subsequently neutralized with mineral acid to polymerize silica as insoluble precipitates. The products is useful in rubber paints as abrasive etc.
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 December 30, 2004 and granted April 16, 2013. A Canadian patent filed from October 1, 1989 lasts 20 years from filing, so its term ended December 30, 2024.
- Certificates of supplementary protection extend only drug patents, and it isn't classified as one.
- 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.