US2947147A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground storage reservoir for light hydrocarbons in semipermeable rock
Assignee: ExxonMobil Technology and Engineering Co
•
Filing: 1955-12-20
•
Granted: 1960-08-02
•
Expires: 1975-12-20
Abstract
No abstract record available.
Inventors
- 👤 Kenneth O Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:38
CPC Classifications
B; B65; B65G; B65G5/00; Y; Y10; Y10T; Y10T137/00; Y10T137/402
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US703824A
Cited
FR760036A
Cited
US2042383A
Cited
US2211958A
Cited
US2387598A
Cited
US2659209A
Cited
US2747774A
Cited
US2798639A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-08-02 | 1964-02-01 | 1964-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-08-02 | 1968-02-01 | 1968-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-08-02 | 1972-02-01 | 1972-08-02 | $7700.00 | Window Closed / Lapsed |