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Expired Canadian patentCanada

Electrode boiler for producing steam or hot water

CA 1270288 C · Owner: Abb Management Ltd. · Inventors: Kunzli, Albert; Schutz, Kurt

CIPO record

Overview

Drawings and full text

Its claims, description and drawings are in the Canadian Patents Database.

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Abstract From the Canadian patent

An electrode boiler has a vessel partly filled with water and provided with at least one electrode connected to an A/C source. The electrode is secured to the vessel above the water level by means of an insulator (6) comprised of a hollow molding body (67) of fluoroplastics and of a support member (61) extending into the molding. At one end of the insulator (6), the molding (62) covers the face of the support member (61). The covered end of the insulator is provided with an annular groove (8'). The end portion of the molding (62) is clamped between the support (61) and the groove (8'). The invention presents advance in the art in that deposits on the insulator are substantially reduced or …

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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 June 12, 1990. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 12, 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.
FiledMay 14, 1987
GrantedJune 12, 1990
Term endedJune 12, 2007
Patent numberCA 1270288 C
Classification (IPC)F24H1/20 +2 more

Timeline

Timeline From CIPO dates

1988199019921994199619982000200220042006Application filedMay 14, 1987Patent grantedJune 12, 1990Term endedJune 12, 2007

Sources & verification

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