Patent US3291106A successfully refreshed from Google Patents.
US3291106A
Expired / Lapsed
US
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Vapor generator with gas recirculation
Assignee: Combustion Engineering Inc
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Filing: 1965-09-07
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Granted: 1966-12-13
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Expires: 1985-09-07
Abstract
No abstract record available.
Inventors
- 👤 Palchik David
- 👤 Jr William H Clayton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 06:13
CPC Classifications
F; F22; F22G; F22G5/00; F22G5/06; F22B; F22B35/00; F22G5/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A ONCE-THROUGH VAPOR GENERATOR HAVING A FURNACE, BURNERS FOR BURNING FUEL WITHIN SAID FURNACE; A FLUE OF CONVEYING COMBUSTION GASES AWAY FROM SAID FURNACE AND STEAM HEATING SURFACE LOCATED IN SAID FLUE, COMPRISING: FURNACE WALL TUBING LINING THE WALLS OF SAID FURNACE; SAID FURNACE WALL TUBING BEING DIVIDED INTO A PLURALITY OF PARALLEL SECTIONS; MEANS FOR PASSING FLUID FLOW THROUGH THE FURNACE WALL TUBES; MEANS FOR DETERMINING THE RELATIVE HEAT ABSORPTION OF EACH OF THE PARALLEL SECTIONS; MEANS FOR RECIRCULATING GAS FROM THE FLUE DOWNSTREAM OF SAID STEAM HAVING SURFACE WITH RESPECT TO GAS FLOW INTO THE FURNACE AT A PLURALITY OF LOCATIONS; EACH
Claim 2
Dependent Claim
104 words
A ONCE-THROUGH VAPOR GENERATOR HAVING A FURNACE, BURNERS FOR BURNING FUEL WITHIN SAID FURNACE; A FLUE OF CONVEYING COMBUSTION GASES AWAY FROM SAID FURNACE AND STEAM HEATING SURFACE LOCATED IN SAID FLUE, COMPRISING: FURNACE WALL TUBING LINING THE WALLS OF SAID FURNACE; SAID FURNACE WALL TUBING BEING DIVIDED INTO A PLURALITY OF PARALLEL SECTIONS; MEANS FOR PASSING FLUID FLOW THROUGH THE FURNACE WALL TUBES; MEANS FOR DETERMINING THE RELATIVE HEAT ABSORPTION OF EACH OF THE PARALLEL SECTIONS; MEANS FOR RECIRCULATING GAS FROM THE FLUE DOWNSTREAM OF SAID STEAM HAVING SURFACE WITH RESPECT TO GAS FLOW INTO THE FURNACE AT A PLURALITY OF LOCATIONS; EACH
References Cited (Backward Citations)
US2840054A
Cited
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 |