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Expired Canadian patentCanada

Combined sulphur burning furnace and boiler

CA 1237573 A · Owner: C-I-L Inc. · Inventors: Cameron, Gordon M.; Mcfarland, John

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

Combined Sulphur Burning Furnace and Boiler A combined sulphur burning furnace and water-cooled boiler arrangement for producing a cooled gaseous sulphur, dioxide-air mixture in which the furnace is located below the boiler tubes arrangement in a vertical cylindrical, shell. The hot gases produced in the furnace exit axially into an upper chamber defined by the water-tube arrangement and pass through the cooling water-tube arrangement in radial outward flow to an outer chamber provided with cold-side by-pass control means and then exit the shell. The apparatus provides for savings in ducting foundations, piping and the like; and permits more efficient sulphur burning and cooling.

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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 7, 1988. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended June 7, 2005.
  • 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 6, 1985
GrantedJune 7, 1988
Term endedJune 7, 2005
Patent numberCA 1237573 A
Classification (IPC)F22D1/00 +2 more

Timeline

Timeline From CIPO dates

1986198819901992199419961998200020022004Application filedJune 6, 1985Patent grantedJune 7, 1988Term endedJune 7, 2005

Sources & verification

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