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Expired Canadian patentCanada

Sliding shuttering system

CA 1284037 C · Owner: Lienbacher, Richard · Inventors: Herzog, Guido; Sommer, Arnold; Lienbacher, Richard

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

The invention relates to a sliding shuttering system for producing concrete structure walls, particularly for conical and/or sloping reinforced concrete structures with annularly closed, varying cross-sections. Especially in the case of sloping structures with upwardly diverging wall regions the, hitherto known sliding shuttering systems can only be used to a limited extent with regards stability and security. In order to be able to perform a sliding process even in the case of extreme structure configurations the support means, is made rigid and is mounted on length-adjustable piles at, least one of the pairwise associated piles being fixed to the support means to prevent horizontal …

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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 May 14, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended May 14, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledDecember 10, 1986
GrantedMay 14, 1991
Term endedMay 14, 2008
Patent numberCA 1284037 C
Classification (IPC)E04G9/00

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 10, 1986Patent grantedMay 14, 1991Term endedMay 14, 2008

Sources & verification

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