Patent US3516495A successfully refreshed from Google Patents.
US3516495A
Expired / Lapsed
US
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Recovery of shale oil
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1967-11-29
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Granted: 1970-06-23
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Expires: 1987-11-29
Abstract
No abstract record available.
Inventors
- 👤 John T Patton
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:05
CPC Classifications
E; E21; E21B; E21B43/00; E21B43/16; E21B43/24; E21B43/164; Y; Y02; Y02P; Y02P90/00; Y02P90/70
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2734578A
Cited
US1342741A
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US1422204A
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US2630307A
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US3342257A
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US3284281A
Cited
US3382922A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1973-06-22 | 1973-12-22 | 1974-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-06-22 | 1977-12-22 | 1978-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-06-22 | 1981-12-22 | 1982-06-23 | $7700.00 | Window Closed / Lapsed |