Patent US3605890A successfully refreshed from Google Patents.
US3605890A
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Hydrogen production from a kerogen-depleted shale formation
Assignee: Chevron USA Inc
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Filing: 1969-06-04
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Granted: 1971-09-20
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Expires: 1989-06-04
Abstract
Abstract A PROCESS FOR PRODUCING A HYDROGEN-RICH GAS WHICH COMPRISES INJECTING STEAM INTO A KEROGEN-DEPLETED FORMATION THROUGH AN INJECTION WELL, CONTACTING THE STEAM WITH CARBONACEOUS MATTER IN THE SHALE FORMATION AT A TEMPERATURE BETWEEN ABOUT 600*F. AND 1,1000*F. TO OBTAIN A HYDROGEN-RICH GAS, AT A TEMPERATURE BETWEEN ABOUT 600*F. AND 1,100*F. AND WITH A RELATIVELY SMALL AMOUNT OF CO IN THE HYDROGEN-RICH GAS, THE CO2 TO CO RATIO BEING AT LEAST 2.5, AND WITHDRAWING THE HYDROGEN-RICH GAS FROM THE SHALE FORMATION THROUGH A PRODUCTION WELL, SAID KEROGEN-DEPLETED SHALE FORMATION HAVING A VOLUME OF AT LEAST 1/2 MILLION CUBIC FEET OF KEROGEN-DEPLETED SHALE.
Inventors
- 👤 Melvin M Holm
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:22
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/243
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |