US3175370A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Roofs for reservoirs
Assignee: Conch International Methane Ltd
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Filing: 1964-03-24
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Granted: 1965-03-30
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Expires: 1984-03-24
Abstract
No abstract record available.
Inventors
- 👤 Schlumberger Etienne Maurice
- 👤 Ploum Arnold Jozef Willem
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 21:13
CPC Classifications
E; E04; E04H; E04H7/00; E04H7/02; E04H7/04; E04H7/06; E04H7/065; F; F17; F17C; F17C3/00; F17C3/005; F17C2201/00; F17C2201/01; F17C2201/0104; F17C2201/0109; F17C2203/00; F17C2203/03; F17C2203/0304; F17C2203/0329; F17C2203/0333; F17C2203/0337; F17C2203/0341; F17C2203/0345; F17C2203/0375; F17C2203/0379; F17C2203/06; F17C2203/0602; F17C2203/0604; F17C2203/0634; F17C2203/0636; F17C2203/0639; F17C2203/0643; F17C2203/0646; F17C2221/00; F17C2221/03; F17C2221/032; F17C2221/033; F17C2221/035; F17C2223/00; F17C2223/01; F17C2223/0146; F17C2223/0153; F17C2223/0161; F17C2223/03; F17C2223/033; F17C2270/00; F17C2270/01; F17C2270/0142; F17C2270/0144; F17C2270/0149
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
87 words
A THERMALLY INSULATED ROOF FOR A GROUND RESERVOIR HAVING A SLOT EXTENDING AROUND THE OUTER EDGE OF THE RESERVOIR, AND SLOT CONTAINING A MATERIAL WHICH IS LIQUID AT AMBIENT TEMPERATURES AND SOLID WHEN THE RESERVOIR IS IN USE, (A) A CONTINUOUS VAPOR IMPERVIOUS MEMBRANE EXTENDING DOWN FROM THE ROOF IN SAID SLOT, (B) SUPPORTING MEANS BETWEEN THE ROOF AND GROUND, (C) METAL-LINED WOODEN BLOCKS BETWEEN SAID SUPPORTING MEANS AND ROOF, ENGAGING SAID ROOF IN SLIDING CONTACT TO ALLOW FOR RADIAL MOVEMENT OF THE ROOF DUE TO CONTRACTION.
References Cited (Backward Citations)
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Cited
US2460355A
Cited
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-03-29 | 1968-09-28 | 1969-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-03-29 | 1972-09-28 | 1973-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-03-29 | 1976-09-28 | 1977-03-30 | $7700.00 | Window Closed / Lapsed |