US3355893A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for locating the contact surface between lighter and heavier liquids in underground caverns
Assignee: DEUTSCHE ERDOL-AKTIENGESELLSCHAFT HAMBURG
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Filing: 1966-03-22
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Granted: 1967-12-05
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Expires: 1986-03-22
Abstract
No abstract record available.
Inventors
- 👤 Kuhne Gerhard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 20:19
CPC Classifications
G; G01; G01F; G01F23/00; F; F17; F17C; F17C1/00; F17C1/007; F17C13/00; F17C13/02; F17C13/021; F17C2201/00; F17C2201/05; F17C2201/052; F17C2205/00; F17C2205/03; F17C2205/0302; F17C2205/0323; F17C2205/0352; F17C2205/0358; F17C2223/00; F17C2223/01; F17C2223/0107; F17C2223/013; F17C2223/0146; F17C2223/0153; F17C2223/04; F17C2223/042; F17C2223/046; F17C2225/00; F17C2225/01; F17C2225/0146; F17C2225/0153; F17C2225/04; F17C2225/042; F17C2225/046; F17C2227/00; F17C2227/01; F17C2227/0128; F17C2227/0135; F17C2227/0192; F17C2250/00; F17C2250/04; F17C2250/0404; F17C2250/0408; F17C2250/043; F17C2250/0443; F17C2250/06; F17C2250/0605; F17C2250/0636; F17C2260/00; F17C2260/02; F17C2260/024; F17C2270/00; F17C2270/01; F17C2270/0142; F17C2270/0144; F17C2270/0149; F17C2270/0152
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
103 words
AN APPARATUS FOR LOCATING THE CONTACT SURFACE BETWEEN LIGHTER AND HEAVIER FLUIDS IN UNDERGROUND CAVERNS WHEREIN FIRST AND SECOND CONDUITS RESPECTIVELY EXTEND DOWNWARDLY INTO A CAVERN BELOW AND ABOVE THE SURFACE OF THE HEAVIER FLUID, COMPRISING A THIRD CONDUIT DIPPING INTO THE HEAVIER FLUID AND HAVING A PREDETERMINED VOLUME, SAID SECOND AND THIRD CONDUITS BEING ARRANGED TO CONVEY LIGHTER FLUID AND SAID FIRST CONDUIT BEING ARRANGED TO CONVEY HEAVIER FLUID WHEREBY THE COMBINED AMOUNT OF LIGHTER FLUID WHICH IS ADMITTED INTO OR EVACUATED FROM SAID CAVERN VIA SAID SECOND AND THIRD CONDUITS EQUALS THE AMOUNT OF HEAVIER FLUID WHICH IS EVACUATED FROM OR
Claim 2
Independent Claim
103 words
AN APPARATUS FOR LOCATING THE CONTACT SURFACE BETWEEN LIGHTER AND HEAVIER FLUIDS IN UNDERGROUND CAVERNS WHEREIN FIRST AND SECOND CONDUITS RESPECTIVELY EXTEND DOWNWARDLY INTO A CAVERN BELOW AND ABOVE THE SURFACE OF THE HEAVIER FLUID, COMPRISING A THIRD CONDUIT DIPPING INTO THE HEAVIER FLUID AND HAVING A PREDETERMINED VOLUME, SAID SECOND AND THIRD CONDUITS BEING ARRANGED TO CONVEY LIGHTER FLUID AND SAID FIRST CONDUIT BEING ARRANGED TO CONVEY HEAVIER FLUID WHEREBY THE COMBINED AMOUNT OF LIGHTER FLUID WHICH IS ADMITTED INTO OR EVACUATED FROM SAID CAVERN VIA SAID SECOND AND THIRD CONDUITS EQUALS THE AMOUNT OF HEAVIER FLUID WHICH IS EVACUATED FROM OR
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |