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Expired Canadian patentCanada

Apparatus for heat treating a continuously moving metal wire

CA 1308340 C · Owner: Evg Entwicklungs-U. Verwertungs- Gesellschaft M.B.H. · Inventors: Stoisser, Gunter; Ritter, Gerhard; Ritter, Klaus

CIPO record

Overview

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

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Abstract From the Canadian patent

Apparatus for heat treating a continuously moving metal wire (19) has at least two drum-like rotational body systems (5a, 5b) which are arranged in the heat-treatment area and around which the wire winds with several turns, and which, to avoid the relative movement between the wire and the surface of the rotational bodies as a result of a length change in the wire during the heat treatment, are each constructed of several disc-shaped rotational bodies (5) which are arranged in sequence, are termed below in short as "discs" and have at their periphery self-contained wire-guiding grooves (6) with all, discs of one disc row (5a) being faced by allocated discs of another disc row (5b) with …

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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 October 6, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 6, 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.
FiledJanuary 8, 1988
GrantedOctober 6, 1992
Term endedOctober 6, 2009
Patent numberCA 1308340 C
Classification (IPC)C21D9/56 +1 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJan 8, 1988Patent grantedOct 6, 1992Term endedOct 6, 2009

Sources & verification

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