Patent US3135901A successfully refreshed from Google Patents.
US3135901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sensitive low frequency servo system
Assignee: Texaco Trinidad Inc
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Filing: 1962-01-08
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Granted: 1964-06-02
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Expires: 1982-01-08
Abstract
No abstract record available.
Inventors
- 👤 Alec L Godier
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 12:54
CPC Classifications
G; G05; G05D; G05D3/00; G05D3/12; G05D3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
56 words
A HIGHLY SENSITIVE STABLE LOW FREQUENCY ELECTRIC SERVO SYSTEM HAVING A CAPACITANCE PROBE AND COMPRISING IN COMBINATION AN ALTERNATING CURRENT CAPACITANCE BRIDGE CIRCUIT HAVING VERY HIGH OUTPUT IMPEDANCE, SAID BRIDGE CIRCUIT COMPRISING BOTH HALVES OF THE SECONDARY WINDING OF A LOW VOLTAGE TRANSFORMER AND SAID PROBE PLUS A VERY HIGH RESISTANCE TEMPERATURE AND HUMIDITY INSENSITIVE CAPACITOR,
Claim 2
Dependent Claim
56 words
A HIGHLY SENSITIVE STABLE LOW FREQUENCY ELECTRIC SERVO SYSTEM HAVING A CAPACITANCE PROBE AND COMPRISING IN COMBINATION AN ALTERNATING CURRENT CAPACITANCE BRIDGE CIRCUIT HAVING VERY HIGH OUTPUT IMPEDANCE, SAID BRIDGE CIRCUIT COMPRISING BOTH HALVES OF THE SECONDARY WINDING OF A LOW VOLTAGE TRANSFORMER AND SAID PROBE PLUS A VERY HIGH RESISTANCE TEMPERATURE AND HUMIDITY INSENSITIVE CAPACITOR,
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) | 1967-06-02 | 1967-12-02 | 1968-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-02 | 1971-12-02 | 1972-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-02 | 1975-12-02 | 1976-06-02 | $7700.00 | Window Closed / Lapsed |