Patent US3018174A successfully refreshed from Google Patents.
US3018174A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High pressure pulverized coal gasifier
Assignee: Babcock and Wilcox Co
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Filing: 1958-07-21
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Granted: 1962-01-23
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Expires: 1978-07-21
Abstract
No abstract record available.
Inventors
- 👤 Andrew B Steever
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:23
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/485; C10J3/50; C10J3/506; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0933
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
145 words
APPARATUS FOR CONTINUOUSLY PRODUCING A SYNTHESIS GAS AT A SUBSTANTIAL SUPERATMOSPHERIC PRESSURE BY THE REACTION AT HIGH TEMPERATURES AND SUBSTANTIAL SUPERATMOSPHERIC PRESSURE OF OXYGEN AND STEAM WITH A SOLID FUEL CONTAINING CARBON; SAID APPARATUS COMPRISING, IN COMBINATION, AN UPRIGHT SEALED PRESSURE VESSEL; A CIRCULAR ROW OF WATER WALL TUBES WITH SEALED INTER-TUBE SPACES FORMING A SEALED REACTION CHAMBER WITHIN SAID PRESSURE VESSEL HAVING A SYNTHESIS GAS OUTLET, SAID TUBES BEING RADIALLY INWARD OF THE INNER SURFACE OF THE PRESSURE VESSEL TO FORM THEREIN AN ANNULUS SPACE; A STEAM AND WATER DRUM IN COMMUNICATION WITH OPPOSITE ENDS OF SAID TUBES TO SUPPLY WATER THERETO AND RECEIVE STEAM THEREFROM; A CONNECTION FROM THE STEAM SPACE OF SAID DRUM TO THE LOWER END OF SAID ANNULUS SPACE TO PROVIDE A PRESSURE-EQUALIZING STEAM BLANKET BETWEEN SAID WATER WALL TUBES AND THE WALL OF THE PRESSURE VESSEL; MEANS ESTABLISHING COM-
Claim 2
Dependent Claim
145 words
APPARATUS FOR CONTINUOUSLY PRODUCING A SYNTHESIS GAS AT A SUBSTANTIAL SUPERATMOSPHERIC PRESSURE BY THE REACTION AT HIGH TEMPERATURES AND SUBSTANTIAL SUPERATMOSPHERIC PRESSURE OF OXYGEN AND STEAM WITH A SOLID FUEL CONTAINING CARBON; SAID APPARATUS COMPRISING, IN COMBINATION, AN UPRIGHT SEALED PRESSURE VESSEL; A CIRCULAR ROW OF WATER WALL TUBES WITH SEALED INTER-TUBE SPACES FORMING A SEALED REACTION CHAMBER WITHIN SAID PRESSURE VESSEL HAVING A SYNTHESIS GAS OUTLET, SAID TUBES BEING RADIALLY INWARD OF THE INNER SURFACE OF THE PRESSURE VESSEL TO FORM THEREIN AN ANNULUS SPACE; A STEAM AND WATER DRUM IN COMMUNICATION WITH OPPOSITE ENDS OF SAID TUBES TO SUPPLY WATER THERETO AND RECEIVE STEAM THEREFROM; A CONNECTION FROM THE STEAM SPACE OF SAID DRUM TO THE LOWER END OF SAID ANNULUS SPACE TO PROVIDE A PRESSURE-EQUALIZING STEAM BLANKET BETWEEN SAID WATER WALL TUBES AND THE WALL OF THE PRESSURE VESSEL; MEANS ESTABLISHING COM-
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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) | 1965-01-22 | 1965-07-24 | 1966-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-22 | 1969-07-24 | 1970-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-22 | 1973-07-24 | 1974-01-23 | $7700.00 | Window Closed / Lapsed |