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Expired Canadian patentCanada

Multiple pane glass unit with electrically conductive transparent film for use as radiation shield

CA 1296579 C · Owner: Hood, Thomas G. · Inventors: Hollars, Dennis; Vincent, Steven M.; Hood, Thomas G.

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

A multiple pane glass unit having a pair of spaced glass panes on opposite sides of a pair of spaced, generally parallel, electrically conductive transparent films mounted by spacers in a taut condition in the space between the panes. The films are in electrical contact with one or more electrical conductors, such as wire cloth, and the electrical conductors are adopted to make electrical contact with ground potential. Electrically conductive transfer tape may be coupled between the outer peripheral margins of each of the films and the adjacent electrical conductor to enhance the electrical contact therebetween. The glass unit is designed to attenuate electromagnetic radiation 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 March 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended March 3, 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.
FiledDecember 8, 1986
GrantedMarch 3, 1992
Term endedMarch 3, 2009
Patent numberCA 1296579 C
Classification (IPC)H05K9/00 +2 more

Timeline

Timeline From CIPO dates

19871990199319961999200220052008Application filedDec 8, 1986Patent grantedMarch 3, 1992Term endedMarch 3, 2009

Sources & verification

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