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Expired Canadian patentCanada

Reticular structures having improved mechanical characteristics as well as process and device for preparing same

CA 1291933 C · Owner: Vittone, Andrea · Inventors: Chiappini, Giuseppe; Vittone, Andrea

CIPO record

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Abstract From the Canadian patent

Reticular structures comprising one or more fibrillated films perpendicularly arranged between two or more fibrillated films are prepared by a process comprising the steps of: feeding one or more fibrillated films onto a conveyor; feeding one or more transversal films perpendicularly to the conveyor feed direction; cutting these transversal films in a position corresponding to the edges of the base film or films; superposing on these transversal films, one or more fibrillated films fed parallel to the conveyor feed direction and causing the cohesion of the resulting composite structure. The reticular structures thus produced are useful for reinforcement of composite materials having …

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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 November 12, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 12, 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.
FiledMay 6, 1986
GrantedNovember 12, 1991
Term endedNovember 12, 2008
Patent numberCA 1291933 C
Classification (IPC)B32B5/02 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedMay 6, 1986Patent grantedNov 12, 1991Term endedNov 12, 2008

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