Method for the production of porous silica granules which have mechanical strength and withstand moisture
CA 1232295 A · Owner: Kemira Oy · Inventors: Virta, Pirkko J.
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
The invention relates to a method for the production of porous silica granules which have mechanical strength and withstand the effect of moisture, by granulating a mixture of a finely-ground silica-containing raw material a binder, and water, and by drying and possibly heat-treating the granules thus obtained. In accordance with the invention the binder used is burnt lime or cement in a minimum amount of 2% of the weight of the silica-containing raw material.
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 February 2, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 2, 2005.
- 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.