US3376929A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Modified in situ combustion well stimulation
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1965-11-17
•
Granted: 1968-04-09
•
Expires: 1985-11-17
Abstract
No abstract record available.
Inventors
- 👤 Alton R Hagedorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 14:19
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)
US3259185A
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US3129757A
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US3172472A
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US3179169A
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US3171482A
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US3180412A
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US3266569A
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US3179167A
Cited
US3259186A
Cited
US3285336A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-04-09 | 1971-10-09 | 1972-04-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-04-09 | 1975-10-09 | 1976-04-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-04-09 | 1979-10-09 | 1980-04-09 | $7700.00 | Window Closed / Lapsed |