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Expired Canadian patentCanada

Agglomeration device

CA 1309710 C · Owner: Holley, Carl A. · Inventors: Holley, Carl A.

CIPO record

Overview

Drawings and full text

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

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Abstract From the Canadian patent

An agglomeration device having a driven shaft and a plurality of pins extending radially outwardly thereof of such length as to sweep closely to the inner surface of the casing of the device. The improvement therein is a layer of high density plastic material attached to the inner surface of the casing and the provision of a ceramic sleeve in the end portion of the pins of extremely hard material such as tungsten carbide, silicon carbide alumina or, boron carbide.

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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 November 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 3, 2009.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 23, 1989
GrantedNovember 3, 1992
Term endedNovember 3, 2009
Patent numberCA 1309710 C
Classification (IPC)B01J2/10 +1 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedAug 23, 1989Patent grantedNov 3, 1992Term endedNov 3, 2009

Sources & verification

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