US3271650A
Expired / Lapsed
US
⏱️ 0.0 years remaining
System for maintaining an object in a predetermined reference plane
Assignee: AT&T Inc
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Filing: 1963-09-24
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Granted: 1966-09-06
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Expires: 1983-09-24
Abstract
No abstract record available.
Inventors
- 👤 Richard L Riddle
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 03:56
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
94 words
IN A SYSTEM FOR MAINTAINING AN OBJECT IN A PREDETERMINED REFERENCE PLANE, A LEVEL SENSOR UNIT, HAVING A PLURALITY OF OUTPUT ELECTRODES, FOR SENSING WHEN THE OBJECT DEVIATES FROM THE REFERENCE PLANE AND FOR DEVELOPING BINARY OUTPUT VOLTAGES AT ITS OUTPUT ELECTRODES INDICATIVE OF THE DEVIATION, A PAIR OF GATE CIRCUITS COUPLED RESPECTIVELY TO EACH OUTPUT ELECTRODE OF THE LEVEL SENSOR UNIT AND RESPONSIVE TO THE BINARY VOLTAGES DEVELOPED BY THE SENSOR UNIT FOR DEVELOPING BINARY FORM OUTPUT VOLTAGES INDICATIVE OF THE OBJECT MOVEMENT NECESSARY TO RESTORE THE OBJECT TO THE REFERENCE PLANE, AND
Claim 2
Dependent Claim
94 words
IN A SYSTEM FOR MAINTAINING AN OBJECT IN A PREDETERMINED REFERENCE PLANE, A LEVEL SENSOR UNIT, HAVING A PLURALITY OF OUTPUT ELECTRODES, FOR SENSING WHEN THE OBJECT DEVIATES FROM THE REFERENCE PLANE AND FOR DEVELOPING BINARY OUTPUT VOLTAGES AT ITS OUTPUT ELECTRODES INDICATIVE OF THE DEVIATION, A PAIR OF GATE CIRCUITS COUPLED RESPECTIVELY TO EACH OUTPUT ELECTRODE OF THE LEVEL SENSOR UNIT AND RESPONSIVE TO THE BINARY VOLTAGES DEVELOPED BY THE SENSOR UNIT FOR DEVELOPING BINARY FORM OUTPUT VOLTAGES INDICATIVE OF THE OBJECT MOVEMENT NECESSARY TO RESTORE THE OBJECT TO THE REFERENCE PLANE, AND
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) | 1969-09-05 | 1970-03-07 | 1970-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-05 | 1974-03-07 | 1974-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-05 | 1978-03-07 | 1978-09-06 | $7700.00 | Window Closed / Lapsed |