Patent US3170141A successfully refreshed from Google Patents.
US3170141A
Expired / Lapsed
US
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Frequency responsive interrogation system having a reply oscillator at the receiver
Assignee: Standard Kollsman Industries Inc
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Filing: 1960-12-21
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Granted: 1965-02-16
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Expires: 1980-12-21
Abstract
No abstract record available.
Inventors
- 👤 Nestlerode Clifford Dale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 03:58
CPC Classifications
H; H04; H04N; H04N7/00; H04N7/16; H04N7/173; H04N2007/17372
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
75 words
IN A COMBINATION AN INTERROGATING TRANSMITTER AND A PLURALITY OF RECEIVERS CONNECTED THERETO ,EACH OF SAID RECEIVERS BEING RESPONSIVE TO SELECTED TONE SIGNALS FROM SAID TRANSMITTER AND OPERABLE TO GENERATE A REPLY TONE SIGNAL, EACH OF SAID RECEIVERS HAVING AN ELECTRON TUBE AMPLIFIER FOR RECEIVING SAID INTERROGATING SIGNALS AND A THYRATRON TUBE DISCHARGEABLE IN RESPONSE TO THE RECEPTION OF SAID SELECTED TONE SIGNALS, A SOLENOID OPERATED UPON DISCHARGE OF SAID THYRATRON TUBE, OSCILLATOR CIRCUITRY NOR-
Claim 2
Dependent Claim
75 words
IN A COMBINATION AN INTERROGATING TRANSMITTER AND A PLURALITY OF RECEIVERS CONNECTED THERETO ,EACH OF SAID RECEIVERS BEING RESPONSIVE TO SELECTED TONE SIGNALS FROM SAID TRANSMITTER AND OPERABLE TO GENERATE A REPLY TONE SIGNAL, EACH OF SAID RECEIVERS HAVING AN ELECTRON TUBE AMPLIFIER FOR RECEIVING SAID INTERROGATING SIGNALS AND A THYRATRON TUBE DISCHARGEABLE IN RESPONSE TO THE RECEPTION OF SAID SELECTED TONE SIGNALS, A SOLENOID OPERATED UPON DISCHARGE OF SAID THYRATRON TUBE, OSCILLATOR CIRCUITRY NOR-
References Cited (Backward Citations)
US2757368A
Cited
US2177843A
Cited
US2419487A
Cited
US2485580A
Cited
US2531416A
Cited
US2807757A
Cited
US2864943A
Cited
US2941161A
Cited
US2913711A
Cited
US3058095A
Cited
US3022492A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-02-16 | 1968-08-17 | 1969-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-02-16 | 1972-08-17 | 1973-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-02-16 | 1976-08-17 | 1977-02-16 | $7700.00 | Window Closed / Lapsed |