US2648599A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat control in vertical furnace by flue gas recirculation
Assignee: Petro-Chem Process Co Inc
•
Filing: 1949-03-22
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Granted: 1953-08-11
•
Expires: 1969-03-22
Abstract
No abstract record available.
Inventors
- 👤 John W Throckmorton
- 👤 John S Wallis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 04:21
CPC Classifications
B; B01; B01J; B01J19/00; B01J19/24; B01J19/2455; B01J19/246; B01J8/00; B01J8/02; B01J8/06; B01J8/062; C; C10; C10G; C10G9/00; C10G9/14; C10G9/18; C10G9/20; B01J2208/00; B01J2208/00008; B01J2208/00017; B01J2208/00477; B01J2208/00495; B01J2208/00504; B01J2208/02; B01J2208/021; B01J2219/00; B01J2219/00761; B01J2219/00763; B01J2219/00765; B01J2219/00768
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
157 words
A VERTICAL FURNACE COMPRISING A RADIANT SECTION HAVING A HOLLOW CYLINDRICAL BANK OF RADIANT HEAT ABSORBING TUBES DEFINING A VERTICAL AXIS, A BURNER AT THE BOTTOM OF SAID RADIANT SECTION FOR DISCHARGING COMBUSTION PRODUCTS UPWARDLY ALONG SAID AXIS, SAID RADIANT SECTION HAVING A FLOOR AT THE BOTTOM THEREOF, AN OPEN ENDED RECIRCULATING TUBE LOCATED WITH ITS AXIS VERTICAL AND WITH ITS LOWER END SPACED ABOVE SAID FLOOR AND ADJACENT TO SAID BURNER, AND A RECIRCULATING DAMPER LOCATED AT THE LOWER END OF SAID RECIRCULATING TUBE, SAID DAMPER COMPRISING AN ANNULAR BAND MOVABLY SUPPORTED ADJACENT THE LOWER END OF SAID RECIRCULATING TUBE, SAID BAND HAVING A WIDTH AT LEAST EQUAL TO THE SPACE BETWEEN SAID FLOOR AND THE LOWER END OF SAID RECIRCULATING TUBE, AND MEANS FOR MOVING SAID BAND VERTICALLY TO REGULATE THE SIZE OF THE RECIRCULATION OPENING AT THE LOWER END OF SAID RECIRCULATING TUBE IN ORDER TO CONTROL THE AMOUNT OF RECIRCULATION WHICH TAKES PLACE.
Claim 2
Dependent Claim
157 words
A VERTICAL FURNACE COMPRISING A RADIANT SECTION HAVING A HOLLOW CYLINDRICAL BANK OF RADIANT HEAT ABSORBING TUBES DEFINING A VERTICAL AXIS, A BURNER AT THE BOTTOM OF SAID RADIANT SECTION FOR DISCHARGING COMBUSTION PRODUCTS UPWARDLY ALONG SAID AXIS, SAID RADIANT SECTION HAVING A FLOOR AT THE BOTTOM THEREOF, AN OPEN ENDED RECIRCULATING TUBE LOCATED WITH ITS AXIS VERTICAL AND WITH ITS LOWER END SPACED ABOVE SAID FLOOR AND ADJACENT TO SAID BURNER, AND A RECIRCULATING DAMPER LOCATED AT THE LOWER END OF SAID RECIRCULATING TUBE, SAID DAMPER COMPRISING AN ANNULAR BAND MOVABLY SUPPORTED ADJACENT THE LOWER END OF SAID RECIRCULATING TUBE, SAID BAND HAVING A WIDTH AT LEAST EQUAL TO THE SPACE BETWEEN SAID FLOOR AND THE LOWER END OF SAID RECIRCULATING TUBE, AND MEANS FOR MOVING SAID BAND VERTICALLY TO REGULATE THE SIZE OF THE RECIRCULATION OPENING AT THE LOWER END OF SAID RECIRCULATING TUBE IN ORDER TO CONTROL THE AMOUNT OF RECIRCULATION WHICH TAKES PLACE.
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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) | 1956-08-10 | 1957-02-09 | 1957-08-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-10 | 1961-02-09 | 1961-08-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-10 | 1965-02-09 | 1965-08-11 | $7700.00 | Window Closed / Lapsed |