Patent US3309915A successfully refreshed from Google Patents.
US3309915A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for converting mechanical energy to electrical energy
Assignee: Union Oil Company of California
•
Filing: 1963-12-23
•
Granted: 1967-03-21
•
Expires: 1983-12-23
Abstract
No abstract record available.
Inventors
- 👤 Robert B Mceuen
- 👤 Robert M Haines
- 👤 Donald L Klass
- 👤 Thomas W Martinek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:49
CPC Classifications
G; G01; G01V; G01V1/00; G01V1/16; G01V1/18; G01V1/181; C; C10; C10M; C10M171/00; C10M171/001
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
67 words
A SEISMOMETER COMPRISING TWO SPACED BODIES MOUNTED FOR RELATIVE MOVEMENT AND HAVING OPPOSING, ELECTRICALLY CONDUCTIVE SURFACES, A SHEAR-RESPONSIVE LIQUID CONFINED IN THE SPACE BETWEEN SAID ELECTRICALLY CONDUCTIVE SURFACES, INERTIAL MEANS ADAPTED TO MOVE SAID BODIES WITH RESPECT TO EACH OTHER WHEN SAID SEISMOMETER IS SUBJECTED TO VIBRATION AND AN ELECTRICAL CIRCUIT CONNECTED BETWEEN SAID ELECTRICALLY CONDUCTIVE SURFACES TO MEASURE A CHANGE IN ELECTROKINETIC PROPERTY OF THE LIQUID.
Claim 2
Dependent Claim
67 words
A SEISMOMETER COMPRISING TWO SPACED BODIES MOUNTED FOR RELATIVE MOVEMENT AND HAVING OPPOSING, ELECTRICALLY CONDUCTIVE SURFACES, A SHEAR-RESPONSIVE LIQUID CONFINED IN THE SPACE BETWEEN SAID ELECTRICALLY CONDUCTIVE SURFACES, INERTIAL MEANS ADAPTED TO MOVE SAID BODIES WITH RESPECT TO EACH OTHER WHEN SAID SEISMOMETER IS SUBJECTED TO VIBRATION AND AN ELECTRICAL CIRCUIT CONNECTED BETWEEN SAID ELECTRICALLY CONDUCTIVE SURFACES TO MEASURE A CHANGE IN ELECTROKINETIC PROPERTY OF THE LIQUID.
References Cited (Backward Citations)
US2665896A
Cited
US2471601A
Cited
US3024641A
Cited
US3046502A
Cited
US3104334A
Cited
US3145563A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-03-20 | 1970-09-19 | 1971-03-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-20 | 1974-09-19 | 1975-03-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-20 | 1978-09-19 | 1979-03-21 | $7700.00 | Window Closed / Lapsed |