Patent US2912382A successfully refreshed from Google Patents.
US3552128A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Underground cavern for storage of hydrocarbons
Assignee: Texaco Inc
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Filing: 1969-06-02
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Granted: 1971-01-05
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Expires: 1989-06-02
Abstract
Abstract A SYSTEM FOR STORING A LIQUID HYDROCARBON PRODUCT IN AN UNDERGROUND CAVERN WITH AN UPPER CAVERNS FOR HOLDING DISPLACING FLUID AND A LOWER CAVERN FOR HOLDING A LIQUID HYDROCARBON PRODUCT, DISPOSED ONE ABOVE THE OTHER AND A WELL BORE FROM THE SURFACE OF THE EARTH TO THE UPPER CAVERN EXTENDING ALSO INTO THE LOWER CAVERN WITH MEANS FOR WITHDRAWING STORED FLUID FROM THE LOWER CAVERN TO THE SURFACE OF THE EARTH AND AT THE SAME TIME ALLOWING LIQUID FROM THE UPPER CAVERN TO FLOW THROUGH THE WELL BORE TO THE LOWER CAVERN WITHOUT MIXING WITH THE LIQUID HYDROCARBON PRODUCT.
Inventors
- 👤 Austen M Shook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 00:42
CPC Classifications
E; E21; E21D; E21D13/00; E21F; E21F17/00; E21F17/16; Y; Y10; Y10T; Y10T137/00; Y10T137/6851
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-04 | 1974-07-06 | 1975-01-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-04 | 1978-07-06 | 1979-01-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-04 | 1982-07-06 | 1983-01-05 | $7700.00 | Window Closed / Lapsed |