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Expired Canadian patentCanada

Static eliminator

CA 1213313 A · Owner: Xerox Corporation · Inventors: Randall, John M.; Franks, William S. Jr.; Swift, Joseph A.

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

A device for neutralizing static electric charge on a surface comprising a support means, a plurality of resilient flexible thin fibers, having an electrical resistivity of from about 2 x 103 ohm-cm to about 1 x 106 ohm-cm. the fibers being supported by the support means in such manner that the fibers are oriented and extend in a uniform direction in a, brush like configuration from the support means so that the distal ends of the fibers may extend toward a surface which has a static charge which one wishes to neutralize. Preferably, the resilient fibers have a resistivity of from about 4 x 104 ohm-cm.to about 4 x 105 ohm-cm. and are arranged in a linear array of spaced discrete bundles of …

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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 28, 1986. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended October 28, 2003.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledNovember 16, 1983
GrantedOctober 28, 1986
Term endedOctober 28, 2003
Patent numberCA 1213313 A
Classification (IPC)G03G21/00 +1 more

Timeline

Timeline From CIPO dates

1984198619881990199219941996199820002002Application filedNov 16, 1983Patent grantedOct 28, 1986Term endedOct 28, 2003

Sources & verification

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