Patent US3278903A successfully refreshed from Google Patents.
US3278903A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Random frequency controlled monitor circuit for security device
Assignee: Individual
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Filing: 1962-07-10
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Granted: 1966-10-11
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Expires: 1982-07-10
Abstract
No abstract record available.
Inventors
- 👤 George A Long
- 👤 Nelson Richard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 19:33
CPC Classifications
G; G08; G08B; G08B29/00; G08B29/02; G08B29/06; G08B29/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
100 words
A SECURITY LINE SUPERVISOR COMPRISING MEANS FOR GENERATING A SIGNAL, FREQUENCY CONTROL MEANS CONNECTED WITH SAID GENERATING MEANS FOR CONTROLLING THE FREQUENCY OF SAID GENERATING MEANS, A RANDOM FREQUENCY SELECTOR CONNECTED WITH SAID FREQUENCY CONTROL MEANS FOR CONTROLLING THE FREQUENCY OF SAID SIGNAL GENERATING MEANS IN A NON REPETITIVE MANNER, A SERIES OF PAIRS OF CHANNELS, EACH OF SAID PAIRS OF CHANNELS BEING CAPABLE OF PASSING ONLY PRESELECTED FREQUENCIES, A SEPARATE REGULATED VOLTAGE SUPPLY FOR EACH CHANNEL, A SEPARATE VOLTAGE DIVIDER CONNECTED WITH EACH OF SAID VOLTAGE SUPPLIES, MEANS UNDER CONTROL OF SAID PRESELECTED FREQUENCIES FOR CONNECTING EACH OF SAID
Claim 2
Dependent Claim
100 words
A SECURITY LINE SUPERVISOR COMPRISING MEANS FOR GENERATING A SIGNAL, FREQUENCY CONTROL MEANS CONNECTED WITH SAID GENERATING MEANS FOR CONTROLLING THE FREQUENCY OF SAID GENERATING MEANS, A RANDOM FREQUENCY SELECTOR CONNECTED WITH SAID FREQUENCY CONTROL MEANS FOR CONTROLLING THE FREQUENCY OF SAID SIGNAL GENERATING MEANS IN A NON REPETITIVE MANNER, A SERIES OF PAIRS OF CHANNELS, EACH OF SAID PAIRS OF CHANNELS BEING CAPABLE OF PASSING ONLY PRESELECTED FREQUENCIES, A SEPARATE REGULATED VOLTAGE SUPPLY FOR EACH CHANNEL, A SEPARATE VOLTAGE DIVIDER CONNECTED WITH EACH OF SAID VOLTAGE SUPPLIES, MEANS UNDER CONTROL OF SAID PRESELECTED FREQUENCIES FOR CONNECTING EACH OF SAID
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-10 | 1970-04-11 | 1970-10-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-10 | 1974-04-11 | 1974-10-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-10 | 1978-04-11 | 1978-10-11 | $7700.00 | Window Closed / Lapsed |