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Expired Canadian patentCanada

Process and apparatus for separating solid granular metallurgical products and their precursors

CA 1059951 A · Owner: Metallgesellschaft Aktiengesellschaft · Inventors: Elsenheimer, Gerd; Klersy, Bernhard; Jelinek, Horst

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Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

In a process of separating solid granular metalluigical products and their precursors by providing a plurality of linearly vibrating inclined screens spatially arranged one over the other, in a housing, each screen having an inclination greater than that of the screen above and wherein the width of the mesh openings in each screen is less than that of the screen above and the width of the mesh openings of each screen is 1.5 to 15 times larger than the desired parting size and feeding the solids, to be separated onto the uppermost screen at the upper end of said housing, comprising flowing a gaseous fluid through at least part of the working space required for screening in a direction …

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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 August 7, 1979. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 7, 1996.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
Filed—
GrantedAugust 7, 1979
Term endedAugust 7, 1996
Patent numberCA 1059951 A
Classification (IPC)B07B9/00 +1 more

Timeline

Timeline From CIPO dates

198019821984198619881990199219941996Patent grantedAug 7, 1979Term endedAug 7, 1996

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Everything on this page comes from the CIPO record linked above. Contains information licensed under the Open Government Licence – Canada.