Process for extracting mineral fibres from rocks
CA 1090754 A · Owner: Geomineraria Italiana S.A.S. Di A. Mancini & C. · Inventors: Mancini, Renato; Mancini, Antonio
Overview
Its claims, description and drawings are in the Canadian Patents Database.
Open the CIPO recordAbstract From the Canadian patent
PROCESS FOR EXTRACTING MINERAL FIBRES, FROM ROCKS . - ABSTRACT OF THE DISCLOSURE . -, This invention relates to a process for extracting mineral fibres, generally known as "asbestos" from rocks and the like and for obtaining rock free from fibre. The process according to the invention comprises a raw material trituration operation and fibre opening and purification operations. Before undergoing the latter operations and before any removal of the strongly magnetic grains present in the raw material, the triturated rock has added to it a small quantity of ferromagnetic powder with which it is intimately mixed, and the mixture obtained is subjected to magnetic grading to separate a magnetic …
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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 December 2, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended December 2, 1997.
- 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.