US3148665A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Boiler waste heat recovery process
Assignee: Gilbert Associates Inc
•
Filing: 1961-08-11
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Granted: 1964-09-15
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Expires: 1981-08-11
Abstract
No abstract record available.
Inventors
- 👤 Jr George W Switzer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 14:12
CPC Classifications
F; F22; F22B; F22B1/00; F22B1/02; F22B1/18; F22B1/1892
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
135 words
A BOILER WASTE HEAT RECOVERY SYSTEM FOR A FUEL COMBUSTION FURNACE SYSTEM INCLUDING A BOILER, COMPRISING AN AIR HEATER FOR PREHEATING AIR INTRODUCED IN THE BOILER, A BOILER AIR INLET CONDUIT INCLUDING FAN MEANS AND SAID AIR HEATER FOR FORCING SAID PREHEATED AIR TO THE BOILER, A CHIMNEY DUCT, A SECOND CONDUIT FOR PASSING FLUE GAS FROM THE BOILER THROUGH SAID AIR HEATER TO SAID CHIMNEY DUCT COMPRISING A HEAT RECOVERY SCRUBBER IN SERIES WITH SAID SECOND CONDUIT AND CHIMNEY DUCT AND INCLUDING PACKING MEANS IN SAID SCRUBBER THROUGH WHICH COLD WATER IS INTRODUCED FROM THE TOP AND FLOWS DOWNWARDLY THERETHROUGH IN SAID SCRUBBER WHILE HOT FLUE GAS FROM SAID SECOND CONDUIT FLOWS UPWARDLY THERETHROUGH, THEREBY CONSIDERABLY COOLING THE FLUE GAS AND WARMING THE DOWNFLOWING WATER, A HEAT EXCHANGER IN SAID SECOND CONDUIT IN COUNTER-
Claim 2
Dependent Claim
135 words
A BOILER WASTE HEAT RECOVERY SYSTEM FOR A FUEL COMBUSTION FURNACE SYSTEM INCLUDING A BOILER, COMPRISING AN AIR HEATER FOR PREHEATING AIR INTRODUCED IN THE BOILER, A BOILER AIR INLET CONDUIT INCLUDING FAN MEANS AND SAID AIR HEATER FOR FORCING SAID PREHEATED AIR TO THE BOILER, A CHIMNEY DUCT, A SECOND CONDUIT FOR PASSING FLUE GAS FROM THE BOILER THROUGH SAID AIR HEATER TO SAID CHIMNEY DUCT COMPRISING A HEAT RECOVERY SCRUBBER IN SERIES WITH SAID SECOND CONDUIT AND CHIMNEY DUCT AND INCLUDING PACKING MEANS IN SAID SCRUBBER THROUGH WHICH COLD WATER IS INTRODUCED FROM THE TOP AND FLOWS DOWNWARDLY THERETHROUGH IN SAID SCRUBBER WHILE HOT FLUE GAS FROM SAID SECOND CONDUIT FLOWS UPWARDLY THERETHROUGH, THEREBY CONSIDERABLY COOLING THE FLUE GAS AND WARMING THE DOWNFLOWING WATER, A HEAT EXCHANGER IN SAID SECOND CONDUIT IN COUNTER-
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-09-15 | 1968-03-16 | 1968-09-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-09-15 | 1972-03-16 | 1972-09-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-09-15 | 1976-03-16 | 1976-09-15 | $7700.00 | Window Closed / Lapsed |