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Expired Canadian patentCanada

Boiler having a pumping effect

CA 1162803 A · Owner: Fa Pulso-Matic · Inventors: Rhodin, Goran

CIPO record

Overview

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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 boiler having a pumping effect comprises a casing (2) which includes an outer and an inner annular liquid com-, partment (3 and 4 respectively) the outer of which has a greater extent in height than the inner one and which communicate with each other at the bottom. A supply pipe (5) is connected at the bottom to the outer liquid compartment while at the top an outlet, pipe (6) is connected to said outer liquid compartment. A heat source is adapted to act in a central through-going combustion chamber (7) to heat the inner walls (8) facing the combustion, chamber, of the inner annular liquid compartment as well as that portion (9) of the outer, equally annular liquid compartment which …

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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 28, 1984. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended February 28, 2001.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledJanuary 21, 1981
GrantedFebruary 28, 1984
Term endedFebruary 28, 2001
Patent numberCA 1162803 A
Classification (IPC)F22B7/00 +2 more

Timeline

Timeline From CIPO dates

1982198419861988199019921994199619982000Application filedJan 21, 1981Patent grantedFeb 28, 1984Term endedFeb 28, 2001

Sources & verification

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