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Expired Canadian patentCanada

Integrating process controller for mixer

CA 1071739 A · Owner: Kabel- Und Metallwerke Gutehoffnungshutte Ag · Inventors: Muhlhoff, Heinz; Volker, Martin

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

Powderous, granular and/or liquidous substances, such as thermoplastic or elastomeric materials are mixed with each other or with fillers, additives etc. in that, the mixing operation is continued until a predetermined amount of mixing work has been expended. The mixing operation can be controlled as to its entire duration on that basis as well as with regard to completion of intermediate steps.

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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 February 12, 1980. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 12, 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.
Filed—
GrantedFebruary 12, 1980
Term endedFebruary 12, 1997
Patent numberCA 1071739 A
Classification (IPC)G05B19/12 +2 more

Timeline

Timeline From CIPO dates

198119831985198719891991199319951997Patent grantedFeb 12, 1980Term endedFeb 12, 1997

Sources & verification

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