Patent US3291182A successfully refreshed from Google Patents.
US3291182A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Means for improving combustion of fuel
Assignee: Dow Technical Cooperative
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Filing: 1965-02-23
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Granted: 1966-12-13
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Expires: 1985-02-23
Abstract
No abstract record available.
Inventors
- 👤 Jr Irving A Dow
- 👤 Martin G Aarflot
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 08:20
CPC Classifications
F; F23; F23C; F23C7/00; F23C7/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
THE COMBINATION WITH A FUEL BURNER FURNACE OF A SECONDARY AIR SUPPLY MEANS COMPRISING A SOURCE OF AIR UNDER PRESSURE, A DEVICE WITHIN THE FURNACE SPACED LATERALLY FROM THE BURNER AND HAVING INNER AND OUTER CYLINDRICAL MEMBERS DEFINING A CLOSED ENDED ANNULAR SPACE THEREBETWEEN, MEANS COUPLING ONE END OF SAID INNER MEMBER TO SAID SOURCE FOR RECEPTION OF AIR UNDER PRESSURE THEREFROM, SAID INNER MEMBER HAVING OPENINGS THERETHROUGH ADJACENT ITS OTHER END FOR PASSAGE OF AIR INTO SAID ANNULAR SPACE AND SAID OUTER MEMBER HAVING AT LEAST ONE ORIFICE IN ITS WALL FOR EMISSION OF A JET OF AIR THERETHROUGH, AND MEANS WITHIN SAID ANNULAR SPACE FOR CAUSING AIR THEREIN CIRCULATE ABOUT THE INNER MEMBER.
Claim 2
Dependent Claim
115 words
THE COMBINATION WITH A FUEL BURNER FURNACE OF A SECONDARY AIR SUPPLY MEANS COMPRISING A SOURCE OF AIR UNDER PRESSURE, A DEVICE WITHIN THE FURNACE SPACED LATERALLY FROM THE BURNER AND HAVING INNER AND OUTER CYLINDRICAL MEMBERS DEFINING A CLOSED ENDED ANNULAR SPACE THEREBETWEEN, MEANS COUPLING ONE END OF SAID INNER MEMBER TO SAID SOURCE FOR RECEPTION OF AIR UNDER PRESSURE THEREFROM, SAID INNER MEMBER HAVING OPENINGS THERETHROUGH ADJACENT ITS OTHER END FOR PASSAGE OF AIR INTO SAID ANNULAR SPACE AND SAID OUTER MEMBER HAVING AT LEAST ONE ORIFICE IN ITS WALL FOR EMISSION OF A JET OF AIR THERETHROUGH, AND MEANS WITHIN SAID ANNULAR SPACE FOR CAUSING AIR THEREIN CIRCULATE ABOUT THE INNER MEMBER.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-12-12 | 1970-06-13 | 1970-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-12-12 | 1974-06-13 | 1974-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-12-12 | 1978-06-13 | 1978-12-13 | $7700.00 | Window Closed / Lapsed |