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Expired Canadian patentCanada

Low btu gas staged air burner for forced-draft service

CA 1287293 C · Owner: Juedes, Dennis Lester · Inventors: Kiczek, Edward Francis; Davis, Lester Warren, Jr.; Geosits, John Peter

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

In its simplest sense the burner of the, present invention includes a swirl chamber for creating a swirling flow path for primary combustion air. The burner also includes means communicating with the swirl chamber for introducing low heating value gas to the primary combustion air for discharge with the air into a flame zone. Also provided are means adjacent to each other for introducing secondary air and for introducing secondary low heating value gas positioned so that the secondary air and secondary low heating value gas intersect the flame zone preferably above the region of the recirculating core of the flame and at such a point that the secondary air and low heating value gas have a …

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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 August 6, 1991. A Canadian patent filed before October 1, 1989 lasted 17 years from grant, so its term ended August 6, 2008.
  • We check Canadian rights only. A patent in its family in another country could still be in force: check its family on Google Patents.
FiledAugust 2, 1988
GrantedAugust 6, 1991
Term endedAugust 6, 2008
Patent numberCA 1287293 C
Classification (IPC)F23D14/02 +2 more

Timeline

Timeline From CIPO dates

1989199119931995199719992001200320052007Application filedAug 2, 1988Patent grantedAug 6, 1991Term endedAug 6, 2008

Sources & verification

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