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Expired Canadian patentCanada

Electrical surface heating element and process for producing same

CA 1266292 C · Owner: Windisch, Josef Gottfried · Inventors: Windisch, Sigrid; Windisch, Josef Gottfried

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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 b s t r a c t, In an electrical surface heating element there are, embedded within a panel of electrically insulating material electrical heating conductors connected to supply conductors the ends of which enter cavities of the panel open to its top surface, which cavities may be closed by removable covers. within at least one of these cavities of each panel connecting, means for connecting adjacent panels can be positioned. Each cavity leads to the panel edge and is constricted in direction towards the panel edge. By removing the covers the electrical, connecting points of neighboring panels are accessible also after having installed the panels

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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 February 27, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 27, 2007.
  • 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 13, 1986
GrantedFebruary 27, 1990
Term endedFebruary 27, 2007
Patent numberCA 1266292 C
Classification (IPC)H05B3/28 +1 more

Timeline

Timeline From CIPO dates

1987199019931996199920022005Application filedNov 13, 1986Patent grantedFeb 27, 1990Term endedFeb 27, 2007

Sources & verification

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