Expired Canadian patentCanada
Method of increasing the bulk density of silica dust
CA 1097033 A · Owner: Elkem-Spigerverket A/S · Inventors: Kongsgaarden, Ole A.
Overview
Drawings and full text
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
A method of increasing the bulk density of silica dust is disclosed. The silica dust is treated in a drum preferably having interna ribs whereby its bulk density is substantially increased.
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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 March 10, 1981. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 10, 1998.
- We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledApril 27, 1977
GrantedMarch 10, 1981
Term endedMarch 10, 1998
Patent numberCA 1097033 A
Classification (IPC)C01B33/12 +2 more
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.