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Expired Canadian patentCanada

Steam generators

CA 1309747 C · Owner: Bayles, Peter William · Inventors: Bayles, Peter William; Million, Philip

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

A steam generator for a wallpaper stripper comprises a member of heat conductive metal in which is cast an electrical heating element of generally W-shape. Water is supplied to an inlet chamber in the member. Leading from the chamber to spaced steam outlets in the member is a series of extended passageways formed by channels between adjacent limbs of the element and ribs that extend both along and across the channels. The nozzles are located in wells.

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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 November 3, 1992. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended November 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.
FiledJune 14, 1989
GrantedNovember 3, 1992
Term endedNovember 3, 2009
Patent numberCA 1309747 C
Classification (IPC)F22B1/28 +2 more

Timeline

Timeline From CIPO dates

1990199219941996199820002002200420062008Application filedJune 14, 1989Patent grantedNov 3, 1992Term endedNov 3, 2009

Sources & verification

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