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Expired Canadian patentCanada

Clothing for the sheet forming section of a papermaking machine with additional floating transverse threads of greater repeat length

CA 1302844 C · Owner: Hermann Wangner Gmbh & Co. Kg · Inventors: Borel, Georg

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

A clothing for the sheet forming section of a papermaking machine is described which comprises a double-layer or multi-layer fabric of interwoven longitudinal and transverse threads and additional transverse threads floating on the paper side. The additional transverse threads have a greater repeat length than the ordinary transverse threads and alternatingly foat in one weave repeat on the paper side, while the next weave repeat they are interwoven in the fabric interior. The additional transverse threads preferably have a smaller diameter than the ordinary transverse threads.

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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 June 9, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 9, 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.
FiledOctober 7, 1987
GrantedJune 9, 1992
Term endedJune 9, 2009
Patent numberCA 1302844 C
Classification (IPC)D03D3/00 +1 more

Timeline

Timeline From CIPO dates

19881991199419972000200320062009Application filedOct 7, 1987Patent grantedJune 9, 1992Term endedJune 9, 2009

Sources & verification

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