US3498378A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Oil recovery from fractured matrix reservoirs
Assignee: ExxonMobil Upstream Research Co
•
Filing: 1967-06-09
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Granted: 1970-03-03
•
Expires: 1987-06-09
Abstract
No abstract record available.
Inventors
- 👤 Herbert L Stone
- 👤 John W Graham
- 👤 Robert J Blackwell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:21
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/18; E21B43/20
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2733206A
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US2452736A
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US2606871A
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US2792894A
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US2846012A
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US2908643A
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US3219114A
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US3286770A
Cited
US3368620A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-03-02 | 1973-09-01 | 1974-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-03-02 | 1977-09-01 | 1978-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-03-02 | 1981-09-01 | 1982-03-03 | $7700.00 | Window Closed / Lapsed |