US3018827A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Single well vertical drive in-situ combustion process
Assignee: Gulf Research and Development Co
•
Filing: 1957-06-17
•
Granted: 1962-01-30
•
Expires: 1977-06-17
Abstract
No abstract record available.
Inventors
- 👤 James H Henderson
- 👤 Malcolm R J Wyllie
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:58
CPC Classifications
E; E21; E21B; E21B36/00; E21B36/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2368424A
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US2412765A
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USRE23733E
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US2767792A
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US2754911A
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US2818118A
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US2819761A
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US2851109A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-01-29 | 1965-07-31 | 1966-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-01-29 | 1969-07-31 | 1970-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-01-29 | 1973-07-31 | 1974-01-30 | $7700.00 | Window Closed / Lapsed |