US3130583A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for ascertaining the level of a liquid in casings and drilled holes
Assignee: Eastman International Co GmbH
•
Filing: 1962-08-22
•
Granted: 1964-04-28
•
Expires: 1982-08-22
Abstract
No abstract record available.
Inventors
- 👤 Greve Wilhelm
- 👤 Meinecke Erich
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:59
CPC Classifications
G; G01; G01F; G01F23/00; G01F23/14; G01F23/16; E; E21; E21B; E21B47/00; E21B47/04; E21B47/047
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
86 words
A METHOD FOR ASCERTAINING WITH RESPECT TO A KNOWN DATUM THE LEVEL OF A LIQUID IN A CASING IN WHICH IS DISPOSED A CONDUIT INTERNALLY OF SAID CASING HAS ONE END IMMERSED IN SAID LIQUID AND AN OPPOSITE END UNIMMERSED IN SAID LIQUID, CLOSING THE UNIMMERSED END OF THE CONDUIT TO MAINTAIN GASEOUS PRESSURE THEREIN, MOVING THE CONDUIT AXIALLY BETWEEN AT LEAST TWO POSITIONS TO VARY THE DISTANCE OF THE UNIMMERSED END RELATIVE TO THE LEVELS OF THE LIQUID TO VARY GASEOUS PRESSURE INTERNALLY OF SAID
Claim 2
Independent Claim
86 words
A METHOD FOR ASCERTAINING WITH RESPECT TO A KNOWN DATUM THE LEVEL OF A LIQUID IN A CASING IN WHICH IS DISPOSED A CONDUIT INTERNALLY OF SAID CASING HAS ONE END IMMERSED IN SAID LIQUID AND AN OPPOSITE END UNIMMERSED IN SAID LIQUID, CLOSING THE UNIMMERSED END OF THE CONDUIT TO MAINTAIN GASEOUS PRESSURE THEREIN, MOVING THE CONDUIT AXIALLY BETWEEN AT LEAST TWO POSITIONS TO VARY THE DISTANCE OF THE UNIMMERSED END RELATIVE TO THE LEVELS OF THE LIQUID TO VARY GASEOUS PRESSURE INTERNALLY OF SAID
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) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |