Patent US3987453A successfully refreshed from Google Patents.
US2644745A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of gases from carbonaceous solids
Assignee: Standard Oil Development Co
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Filing: 1947-04-01
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Granted: 1953-07-07
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Expires: 1967-04-01
Abstract
No abstract record available.
Inventors
- 👤 Charles E Hemminger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 05:35
CPC Classifications
C; C10; C10J; C10J3/00; C10J3/46; C10J3/48; C10J3/485; C10J3/487; C10J2300/00; C10J2300/09; C10J2300/0913; C10J2300/093; C10J2300/0933; Y; Y10; Y10S; Y10S48/00; Y10S48/02
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
155 words
IN THE PROCESS OF CONVERTING SOLID CARBONACEOUS ASH-CONTAINING MATERIALS INTO GASES CONTAINING CARBON MONOXIDE, THE IMPROVEMENT WHICH COMPRISES FORMING A SUSPENSION OF FINELY DIVIDED CARBONACEOUS ASH-CONTAINING SOLIDS IN A GASEOUS MEDIUM CONTAINING OXYGEN IN ADMIXTURE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF STEAM, CARBON DIOXIDE AND MIXTURES THEREOF, FORCING THE RESULTING SUSPENSION AT A HIGH LINEAR VELOCITY TANGENTIALLY INTO A LOWER PART OF AN UPRIGHT EXTENDED CONVERSION ZONE HAVING A CIRCULAR HORIZONTAL CROSS-SECTION AND THEREBY CAUSING VIOLENT AGITATION OF SAID SUSPENSION IN SAID CONVERSION ZONE, MAINTAINING IN SAID CONVERSION ZONE A PRESSURE BETWEEN ATMOSPHERIC AND ABOUT 400 LBS. PER SQUARE INCH AND A CONVERSION TEMPERATURE ABOVE THE FUSION POINT OF THE ASH CONSTITUENTS OF THE CARBONACEOUS SOLIDS IN THE RANGE FROM 2100 TO 2500* F., PASSING THE INTRODUCED SUSPENSION UPWARDLY THROUGH THE CONVERSION ZONE, PROVIDING A GRADUALLY INCREASING CONVERSION SPACE FOR SAID UPWARDLY PASSING SUSPENSION, THEREBY GRADUALLY REDUCING THE LINEAR VELOCITY OF THE
Claim 2
Dependent Claim
155 words
IN THE PROCESS OF CONVERTING SOLID CARBONACEOUS ASH-CONTAINING MATERIALS INTO GASES CONTAINING CARBON MONOXIDE, THE IMPROVEMENT WHICH COMPRISES FORMING A SUSPENSION OF FINELY DIVIDED CARBONACEOUS ASH-CONTAINING SOLIDS IN A GASEOUS MEDIUM CONTAINING OXYGEN IN ADMIXTURE WITH A MEMBER SELECTED FROM THE GROUP CONSISTING OF STEAM, CARBON DIOXIDE AND MIXTURES THEREOF, FORCING THE RESULTING SUSPENSION AT A HIGH LINEAR VELOCITY TANGENTIALLY INTO A LOWER PART OF AN UPRIGHT EXTENDED CONVERSION ZONE HAVING A CIRCULAR HORIZONTAL CROSS-SECTION AND THEREBY CAUSING VIOLENT AGITATION OF SAID SUSPENSION IN SAID CONVERSION ZONE, MAINTAINING IN SAID CONVERSION ZONE A PRESSURE BETWEEN ATMOSPHERIC AND ABOUT 400 LBS. PER SQUARE INCH AND A CONVERSION TEMPERATURE ABOVE THE FUSION POINT OF THE ASH CONSTITUENTS OF THE CARBONACEOUS SOLIDS IN THE RANGE FROM 2100 TO 2500* F., PASSING THE INTRODUCED SUSPENSION UPWARDLY THROUGH THE CONVERSION ZONE, PROVIDING A GRADUALLY INCREASING CONVERSION SPACE FOR SAID UPWARDLY PASSING SUSPENSION, THEREBY GRADUALLY REDUCING THE LINEAR VELOCITY OF THE
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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) | 1956-07-06 | 1957-01-05 | 1957-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-07-06 | 1961-01-05 | 1961-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-07-06 | 1965-01-05 | 1965-07-07 | $7700.00 | Window Closed / Lapsed |