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Expired Canadian patentCanada

Electroconductive thermoplastic sheet

CA 1307732 C · Owner: Daimon, Takashi · Inventors: Sakamoto, Hideshi; Daimon, Takashi

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

There is here provided an electroconductive thermoplastic sheet prepared by superposing, upon either surface or both the surface of a thermoplastic film or sheet an, electroconductive nonwoven fabric formed by irregularly twining an electorconductive fiber into a hot-melt adhesive fiber, further superposing, upon the outer side of the electroconductive nonwoven fabric, a nonwoven fabric made from the hot-melt adhesive fiber to obtain a laminate and, fusing the laminate integrally. The sheet of the present invention retains transparency and electroconductivity, and it is suitable for for, example, materials for packing of electronic parts and precision instruments where dust deposition and …

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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 September 22, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended September 22, 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.
FiledJuly 21, 1988
GrantedSeptember 22, 1992
Term endedSeptember 22, 2009
Patent numberCA 1307732 C
Classification (IPC)B32B5/12 +2 more

Timeline

Timeline From CIPO dates

1989199219951998200120042007Application filedJuly 21, 1988Patent grantedSep 22, 1992Term endedSep 22, 2009

Sources & verification

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