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Expired Canadian patentCanada

Dry thermal processor

CA 1331573 C · Owner: Taciuk, William · Inventors: Taciuk, William; Caple, Roderick; Taciuk, Gordon

CIPO record

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

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Abstract From the Canadian patent

IMPROVED DRY THERMAL PROCESSOR", ABSTRACT OF THE DISCLOSURE The processor is of the type incorporating horizontal concentric, co-extensive inner and outer tubular members which rotate together. The processor is modified in the following respects:, - The front end of the inner tubular member is circumferentially corrugated and may be provided in the form of a plurality of parallel tubes arranged in a ring array, to thereby increase the shell area to promote heat transfer through the tube walls;, - Means are provided for interconnecting the tubular members, which means can accommodate differing rates of thermal expansion; and, - A rock recycle tube assembly is provided to recover oversize …

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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 23, 1994. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 23, 2011.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledMay 9, 1989
GrantedAugust 23, 1994
Term endedAugust 23, 2011
Patent numberCA 1331573 C
Classification (IPC)C10G1/00 +2 more

Timeline

Timeline From CIPO dates

19901993199619992002200520082011Application filedMay 9, 1989Patent grantedAug 23, 1994Term endedAug 23, 2011

Sources & verification

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