Patent US3095744A successfully refreshed from Google Patents.
US3095744A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gravity gradient measuring device
Assignee: Hunting Survey Corp Ltd
•
Filing: 1960-08-11
•
Granted: 1963-07-02
•
Expires: 1980-08-11
Abstract
No abstract record available.
Inventors
- 👤 Hutchins Roger William
- 👤 Arcy Donald F D
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 19:05
CPC Classifications
G; G01; G01V; G01V7/00
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A GRAVITY GRADIENT SENSING DEVICE COMPRISING: TWO COLUMNS IN THE FORM OF TWO SUBSTANTIALLY VERTICALLY DISPOSED TUBES, THE UPPER CLOSED ENDS OF WHICH ARE AT EQUAL PRESSURE, THE BOTTOM ENDS THEREOF BEING JOINED BY A COMMON COMMUNICATING TUBE THEREBETWEEN; A DIFFERENT LIQUID IN EACH OF SAID COLUMNS, SAID LIQUIDS BEING IN HYDROSTATIC EQUILIBRIUM AT A PREDETERMINED GRAVITATIONAL GRADIENT AND MOVABLE IN SAID TUBE UNDER THE INFLUENCE OF A DIFFERENT GRAVITATIONAL GRADIENT TO RE-ESTABLISH HYDROSTATIC EQUILIBRIUM AT A NEW POSITION IN SAID TUBE; A VOLUME OF GAS SEPARATING EACH OF SAID LIQUIDS FROM THE CLOSED ENDS OF THE TUBES DESCRIBING THE COLUMNS THEREFOR; MEANS FOR GEN-
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) | 1966-07-01 | 1966-12-31 | 1967-07-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-07-01 | 1970-12-31 | 1971-07-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-07-01 | 1974-12-31 | 1975-07-02 | $7700.00 | Window Closed / Lapsed |