US3121841A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Conelrad warning device
Assignee: Amalga Corp
•
Filing: 1961-07-12
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Granted: 1964-02-18
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Expires: 1981-07-12
Abstract
No abstract record available.
Inventors
- 👤 Bryant F Craig
- 👤 Robert E Mccartney
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 01:48
CPC Classifications
G; G08; G08B; G08B27/00; G08B27/008
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A WARNING DEVICE COMPRISING A RADIO RECEIVER HAVING AT LEAST ONE AUDIO STAGE, A SPEAKER, SWITCH MEANS FOR CONNECTING SAID SPEAKER TO THE OUTPUT OF SAID AUDIO STAGE, AND A REED RELAY CONNECTED BETWEEN THE OUTPUT OF SAID AUDIO STAGE AND SAID SWITCH MEANS, SAID REED RELAY BEING HELD CLOSED BY BIAS SIGNALS FOR SAID AUDIO STAGE DURING NON-BROADCAST PERIODS AND DURING REGULAR PROGRAMMING, SAID RELAY OPENING UNDER THE INFLUENCE OF A SINGLE FREQUENCY OUTPUT SIGNAL FROM SAID AUDIO STAGE OF AT LEAST AP-
Claim 2
Dependent Claim
84 words
A WARNING DEVICE COMPRISING A RADIO RECEIVER HAVING AT LEAST ONE AUDIO STAGE, A SPEAKER, SWITCH MEANS FOR CONNECTING SAID SPEAKER TO THE OUTPUT OF SAID AUDIO STAGE, AND A REED RELAY CONNECTED BETWEEN THE OUTPUT OF SAID AUDIO STAGE AND SAID SWITCH MEANS, SAID REED RELAY BEING HELD CLOSED BY BIAS SIGNALS FOR SAID AUDIO STAGE DURING NON-BROADCAST PERIODS AND DURING REGULAR PROGRAMMING, SAID RELAY OPENING UNDER THE INFLUENCE OF A SINGLE FREQUENCY OUTPUT SIGNAL FROM SAID AUDIO STAGE OF AT LEAST AP-
References Cited (Backward Citations)
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Cited
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-17 | 1967-08-19 | 1968-02-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-17 | 1971-08-19 | 1972-02-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-17 | 1975-08-19 | 1976-02-18 | $7700.00 | Window Closed / Lapsed |