Patent US3135896A successfully refreshed from Google Patents.
US3135896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Narrow band sensing circuit
Assignee: United States Instrument Corp
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Filing: 1961-06-06
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Granted: 1964-06-02
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Expires: 1981-06-06
Abstract
No abstract record available.
Inventors
- 👤 Charles W Carter
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 10:29
CPC Classifications
H; H01; H01H; H01H51/00; H01H51/30; H01H51/32; H01H47/00; H01H47/02; H01H47/20
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
87 words
A NARROW BAND SENSING CIRCUIT COMPRISING A PAIR OF INPUT TERMINALS, AN INPUT VOLTAGE REGULATOR SECTION CONNECTED ACROSS SAID INPUT TERMINALS, A SERIES RESONANT SECTION CONNECTED IN PARALLEL WITH A PORTION OF SAID INPUT VOLTAGE REGULATOR SECTION, A VOLTAGE THRESHOLD SECTION CONNECTED IN PARALLEL WITH ONE REACTIVE PORTION OF SAID RESONANT SECTION, AND SWITCHING SECTION CONNECTED TO SAID VOLTAGE THRESHOLD SECTION AND ACTUATED THEREBY IN RESPONSE TO THE APPLICATION OF AN INPUT SIGNAL TO SAID INPUT TERMINALS OF A FREQUENCY TO WHICH SAID TUNED SECTION IS TUNED.
Claim 2
Dependent Claim
87 words
A NARROW BAND SENSING CIRCUIT COMPRISING A PAIR OF INPUT TERMINALS, AN INPUT VOLTAGE REGULATOR SECTION CONNECTED ACROSS SAID INPUT TERMINALS, A SERIES RESONANT SECTION CONNECTED IN PARALLEL WITH A PORTION OF SAID INPUT VOLTAGE REGULATOR SECTION, A VOLTAGE THRESHOLD SECTION CONNECTED IN PARALLEL WITH ONE REACTIVE PORTION OF SAID RESONANT SECTION, AND SWITCHING SECTION CONNECTED TO SAID VOLTAGE THRESHOLD SECTION AND ACTUATED THEREBY IN RESPONSE TO THE APPLICATION OF AN INPUT SIGNAL TO SAID INPUT TERMINALS OF A FREQUENCY TO WHICH SAID TUNED SECTION IS TUNED.
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 |