Oxygen-fuel burner with adjustable flame characteristics
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
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Dec 9, 2003
Grant Date -
Mar 20, 2003
app pub date -
Sep 17, 2001
filing date -
Sep 17, 2001
priority date (Note) -
In Force
status (Latency Note)
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Importance

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Abstract
An oxy-fuel burner generates a long, luminous, stable and adjustable flame temperature profile flame by incorporating separate, fuel and oxygen jets oriented in a unique geometry. In one preferred embodiment, the fuel is injected horizontally at medium injection velocity (50-200 m/s) while primary oxygen is injected underneath the fuel jet at supersonic velocity (300-500 m/s). The supersonic velocity oxygen jet (20 to 50% required for stoichiometric combustion) entrains fuel and furnaces gases in it's core for the primary flame development over the furnace load. The subsequent mixing of the fuel, primary oxygen and entrained furnace gases establish a low NOx, stable, long and luminous primary flame. The secondary oxidant, preferably air or low purity oxygen (50 to 80% of stoichiometric needs), is injected above the flame using one or more oxygen jets to create an oxy-fuel flame with adjustable flame characteristics. The secondary oxidant completes unfinished combustion of flame gases containing CO, H.sub.2, CH.sub.4, soot and HC. The horizontal injection angle for all jets allow delayed mixing and a much longer flame. Due to the massive furnace gas entrainment process, the resulting flame provides adjustability in flame temperature profile as well as lower NOx formation. By changing the fuel, primary oxygen, and secondary oxidant injection velocities, the relative proportion of primary and secondary oxidants, and the relative positions of injectors, a fully adjustable flame is developed.
First Claim
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Family

- 15 United States
- 10 France
- 8 Japan
- 7 China
- 5 Korea
- 2 Other
Patent Owner(s)
Patent Owner | Address | |
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AMERICAN AIR LIQUIDE INC | 200 GBC DRIVE NEWARK DE 19702 |
International Classification(s)

- 2001 Application Filing Year
- F23M Class
- 34 Applications Filed
- 12 Patents Issued To-Date
- 35.30 % Issued To-Date
Inventor(s)
Inventor Name | Address | # of filed Patents | Total Citations |
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Borders, Harley A | Lombard, IL | 19 | 857 |
# of filed Patents : 19 Total Citations : 857 | |||
Joshi, Mahendra L | Darien, IL | 50 | 1797 |
# of filed Patents : 50 Total Citations : 1797 | |||
Legiret, Thierry | Toussus le Noble, FR | 9 | 107 |
# of filed Patents : 9 Total Citations : 107 | |||
Streicher, Eric | Downers Grove, IL | 9 | 92 |
# of filed Patents : 9 Total Citations : 92 |
Cited Art Landscape
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Patent Citation Ranking
- 19 Citation Count
- F23M Class
- 88.24 % this patent is cited more than
- 22 Age
Forward Cite Landscape
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Maintenance Fees
Fee | Large entity fee | small entity fee | micro entity fee | due date |
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Fee | Large entity fee | small entity fee | micro entity fee |
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Surcharge after expiration - Late payment is unavoidable | $700.00 | $350.00 | $175.00 |
Surcharge after expiration - Late payment is unintentional | $1,640.00 | $820.00 | $410.00 |
Full Text

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Dec 19, 2022 | LAPS | LAPSE FOR FAILURE TO PAY MAINTENANCE FEES | free format text: PATENT EXPIRED FOR FAILURE TO PAY MAINTENANCE FEES (ORIGINAL EVENT CODE: EXP.); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Dec 19, 2022 | STCH | INFORMATION ON STATUS: PATENT DISCONTINUATION | free format text: PATENT EXPIRED DUE TO NONPAYMENT OF MAINTENANCE FEES UNDER 37 CFR 1.362 |
Nov 16, 2022 | FP | LAPSED DUE TO FAILURE TO PAY MAINTENANCE FEE | Effective Date: Nov 16, 2022 |
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Nov 16, 2010 | I | Issuance | |
Oct 31, 2010 | FEPP | FEE PAYMENT PROCEDURE | free format text: PAYOR NUMBER ASSIGNED (ORIGINAL EVENT CODE: ASPN); ENTITY STATUS OF PATENT OWNER: LARGE ENTITY |
Oct 27, 2010 | STCF | INFORMATION ON STATUS: PATENT GRANT | free format text: PATENTED CASE |
Apr 17, 2008 | P | Published | |
Oct 05, 2007 | F | Filing | |
Oct 02, 2007 | AS | ASSIGNMENT | free format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNOR:FUJITA, TAKASHI;REEL/FRAME:020025/0739 Owner name: CANON KABUSHIKI KAISHA, JAPAN Effective Date: Oct 02, 2007 |
Oct 13, 2006 | PD | Priority Date |

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