US2908485A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process using fluidized solids
Assignee: ExxonMobil Technology and Engineering Co
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Filing: 1956-11-27
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Granted: 1959-10-13
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Expires: 1976-11-27
Abstract
No abstract record available.
Inventors
- 👤 John P Longwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 20:32
CPC Classifications
F; F28; F28C; F28C3/00; F28C3/10; F28C3/12; F28C3/16
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
131 words
IN A PROCESS FOR RECOVERING HEAT FROM NON GASEOUS STREAMS CONTAINING SUSPENDED SOLID DUST PARTICLES BELOW ABOUT 10 MICRONS IN SIZE BY INDIRECTLY CONTACTING SUCH A HOT GASEOUS STREAM WITH A COOLER HEAT EXCHANGE MEDIUM WHEREIN SAID HOT GASEOUS STREAM IS PASSING THROUGH A HEAT EXCHANGE TUBE PLATES OUT DUST PARTICLES ON THE WALL OF THE TUBE THUS REDUCING HEAT TRANSFER THROUGH THE WALL OF THE TUBE, THE IMPROVEMENT WHICH COMPRISE REDUCING THE EXISTING TEMPERATURE DIFFERENTIAL BETWEEN THE TUBE WALL AND SAID HOT GASEOUS STREAM IN THE TUBE AT INTERVALS WITHOUT SHUTTING DOWN THE FLOW OF SAID HOT GASEOUS STREAM THROUGH THE HEAT EXCHANGE STEP TO SUBSTANTIALLY EQUALIZE THE TEMPERATURE BETWEEN SAID GASEOUS STREAM AND THE TUBE WILL TO LOOSEN AND SWEEP AWAY THE PLATED DUST PARTICLES BY SAID GASEOUS STEAM.
Claim 2
Dependent Claim
131 words
IN A PROCESS FOR RECOVERING HEAT FROM NON GASEOUS STREAMS CONTAINING SUSPENDED SOLID DUST PARTICLES BELOW ABOUT 10 MICRONS IN SIZE BY INDIRECTLY CONTACTING SUCH A HOT GASEOUS STREAM WITH A COOLER HEAT EXCHANGE MEDIUM WHEREIN SAID HOT GASEOUS STREAM IS PASSING THROUGH A HEAT EXCHANGE TUBE PLATES OUT DUST PARTICLES ON THE WALL OF THE TUBE THUS REDUCING HEAT TRANSFER THROUGH THE WALL OF THE TUBE, THE IMPROVEMENT WHICH COMPRISE REDUCING THE EXISTING TEMPERATURE DIFFERENTIAL BETWEEN THE TUBE WALL AND SAID HOT GASEOUS STREAM IN THE TUBE AT INTERVALS WITHOUT SHUTTING DOWN THE FLOW OF SAID HOT GASEOUS STREAM THROUGH THE HEAT EXCHANGE STEP TO SUBSTANTIALLY EQUALIZE THE TEMPERATURE BETWEEN SAID GASEOUS STREAM AND THE TUBE WILL TO LOOSEN AND SWEEP AWAY THE PLATED DUST PARTICLES BY SAID GASEOUS STEAM.
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) | 1962-10-12 | 1963-04-13 | 1963-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-10-12 | 1967-04-13 | 1967-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-10-12 | 1971-04-13 | 1971-10-13 | $7700.00 | Window Closed / Lapsed |