US3344607A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Insulated frozen earth storage pit and method of constructing same
Assignee: Phillips Petroleum Co
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Filing: 1964-11-30
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Granted: 1967-10-03
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Expires: 1984-11-30
Abstract
No abstract record available.
Inventors
- 👤 Vignovich Barney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 22:54
CPC Classifications
F; F17; F17C; F17C3/00; F17C3/005; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2201/0119; F17C2203/00; F17C2203/03; F17C2203/0304; F17C2203/0329; F17C2203/0375; F17C2203/0383; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2260/00; F17C2260/03; F17C2260/035; F17C2260/038; F17C2270/00; F17C2270/01; F17C2270/0142; F17C2270/0144; F17C2270/0149
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
IN A HEATING OF CONSTRUCTING A FROZEN EARTH STORAGE PIT WHEREIN THE WALLS AND FLOOR OF THE PIT ARE FORMED OF A WATER SATURATED FROZEN EARTH SHELL, THE IMPROVEMENT COMPRISING INJECTING A GAS INTO THE EARTH ADJACENT THE OUTER SURFACE OF THE FROZEN EARTH SHELL REMOTE FROM THE PIT SO AS TO FORM A LAYER OF GAS BUBBLES IN THE WATER SATURATED EARTH ON THE OUTER SURFACES OF THE FROZEN EARTH SHELL SO THAT THE LAYER OF BUBBLES IS FROZEN TO THE OUTER SURFACE OF THE SHELL.
References Cited (Backward Citations)
US3064436A
Cited
US2991624A
Cited
US3159006A
Cited
FR1298205A
Cited
US3175370A
Cited
US3205665A
Cited
US3274785A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-10-02 | 1971-04-03 | 1971-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-10-02 | 1975-04-03 | 1975-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-10-02 | 1979-04-03 | 1979-10-03 | $7700.00 | Window Closed / Lapsed |