US3228451A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of burning fuels
Assignee: Urquharts 1926 Ltd
•
Filing: 1963-08-23
•
Granted: 1966-01-11
•
Expires: 1983-08-23
Abstract
No abstract record available.
Inventors
- 👤 Fraser Reginald Percy
- 👤 Maxwell S Woosnam
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 09:09
CPC Classifications
F; F23; F23C; F23C6/00; F23C6/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
168 words
A METHOD OF BURNING RESIDUAL FUEL OILS CONTAINING SULPHUR FOR ELIMINATING THE PRODUCTION OF SO3, COMPRISING THE STEPS OF FIRST BURING AT LEAST A PART OF THE FUEL AT AN AIR FUEL RATIO LESS THAN THAT THEORETICALLY REQUIRED FRO BURNING UNDER CONDITIONS CORRESPONDING TO STOICHIOMETRIC CONDITIONS, SAID BURNIN BEING AT A PRACTICAL BURNING TEMPERATURE WHICH IS LESS THAN THE TEMPERATURE AT WHICH SO3 IS FORMED FROM SO2, AND WHICH BURNING IS UNDER CONDITIONS WHICH WILL PRODUCE A COMBUSTIBLE GAS, REMOVING A QUANTITY OF HEAT FROM THE COMBUSTIBLE GAS WHICH IS PRODUCED BY SUCH BURNING SUFFICIENT TO LOWER THE TEMPERATURE OF THE COMBUSTIBLE GAS TO A TEMPERATURE SUCH THAT WHEN FURTHER AIR IS ADDED TO THE COMBUSTIBLE GAS TO COMPLETE THE COMBUSTION OF THE FUEL, THE PRODUCTS OF COMBUSTION WILL BE HEATED ONLY TO A TEMPERATURE WHICH IS LESS THAN THE TEMPERATRUE AT WHICH SO3 IS FORMED FROM SO2, AND WHICH TEMPERATURE IS SUBSTANTIALLY LOWER THAN THE PRACTICAL TEMPERATURE OF BURNING OF THE FUEL AT AN AIR FUEL RATIO
Claim 2
Independent Claim
168 words
A METHOD OF BURNING RESIDUAL FUEL OILS CONTAINING SULPHUR FOR ELIMINATING THE PRODUCTION OF SO3, COMPRISING THE STEPS OF FIRST BURING AT LEAST A PART OF THE FUEL AT AN AIR FUEL RATIO LESS THAN THAT THEORETICALLY REQUIRED FRO BURNING UNDER CONDITIONS CORRESPONDING TO STOICHIOMETRIC CONDITIONS, SAID BURNIN BEING AT A PRACTICAL BURNING TEMPERATURE WHICH IS LESS THAN THE TEMPERATURE AT WHICH SO3 IS FORMED FROM SO2, AND WHICH BURNING IS UNDER CONDITIONS WHICH WILL PRODUCE A COMBUSTIBLE GAS, REMOVING A QUANTITY OF HEAT FROM THE COMBUSTIBLE GAS WHICH IS PRODUCED BY SUCH BURNING SUFFICIENT TO LOWER THE TEMPERATURE OF THE COMBUSTIBLE GAS TO A TEMPERATURE SUCH THAT WHEN FURTHER AIR IS ADDED TO THE COMBUSTIBLE GAS TO COMPLETE THE COMBUSTION OF THE FUEL, THE PRODUCTS OF COMBUSTION WILL BE HEATED ONLY TO A TEMPERATURE WHICH IS LESS THAN THE TEMPERATRUE AT WHICH SO3 IS FORMED FROM SO2, AND WHICH TEMPERATURE IS SUBSTANTIALLY LOWER THAN THE PRACTICAL TEMPERATURE OF BURNING OF THE FUEL AT AN AIR FUEL RATIO
References Cited (Backward Citations)
US2927632A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-01-10 | 1969-07-12 | 1970-01-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-10 | 1973-07-12 | 1974-01-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-10 | 1977-07-12 | 1978-01-11 | $7700.00 | Window Closed / Lapsed |