Patent US3304495A successfully refreshed from Google Patents.
US3304495A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Submarine detection system
Assignee: Individual
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Filing: 1952-07-11
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Granted: 1967-02-14
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Expires: 1972-07-11
Abstract
No abstract record available.
Inventors
- 👤 Charles B Brown
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:03
CPC Classifications
G; G01; G01S; G01S11/00; G01S11/02; G01S11/06; H; H03; H03J; H03J7/00; H03J7/18; H03J7/32
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
123 words
IN A SUBMARINE DETECTION SYSTEM OF A CHARACTER ADAPTED FOR PICKUP OF COMMUTATOR RIPPLE FREQUENCY SIGNAL INTELLIGENCE, THE COMBINATION WITH A DETECTION MEANS AND BAND PASS AMPLIFIER MEANS, A PHASE COMPARISON MEANS CONNECTED TO THE OUTPUT OF SAID AMPLIFIER MEANS, A CATHODE RAY TUBE, MEANS FOR APPLYING THE OUTPUT OF SAID PHASE COMPARATOR MEANS TO THE VERTICAL DEFLECTION PLATES OF SAID CATHODE RAY TUBE, MEANS PROVIDING A HORIZONTAL SWEEP FOR THE ELECTRON BEAM OF SAID CATHODE RAY TUBE, AND VARIABLE FREQUENCY CONTROL MEANS FOR SAID PHASE COMPARATOR OF A CHARACTER TO PERMIT THE PASSING TO SAID CATHODE RAY TUBE OF ALL RECEIVED SIGNAL INTELLIGENCE OF PHASE AND FREQUENCY CORRESPONDENCE TO SAID CONTROL MEANS WITH A CORRELATIVE REJECTION THEREIN OF ALL SIGNALS DIFFERING THEREFROM.
Claim 2
Dependent Claim
123 words
IN A SUBMARINE DETECTION SYSTEM OF A CHARACTER ADAPTED FOR PICKUP OF COMMUTATOR RIPPLE FREQUENCY SIGNAL INTELLIGENCE, THE COMBINATION WITH A DETECTION MEANS AND BAND PASS AMPLIFIER MEANS, A PHASE COMPARISON MEANS CONNECTED TO THE OUTPUT OF SAID AMPLIFIER MEANS, A CATHODE RAY TUBE, MEANS FOR APPLYING THE OUTPUT OF SAID PHASE COMPARATOR MEANS TO THE VERTICAL DEFLECTION PLATES OF SAID CATHODE RAY TUBE, MEANS PROVIDING A HORIZONTAL SWEEP FOR THE ELECTRON BEAM OF SAID CATHODE RAY TUBE, AND VARIABLE FREQUENCY CONTROL MEANS FOR SAID PHASE COMPARATOR OF A CHARACTER TO PERMIT THE PASSING TO SAID CATHODE RAY TUBE OF ALL RECEIVED SIGNAL INTELLIGENCE OF PHASE AND FREQUENCY CORRESPONDENCE TO SAID CONTROL MEANS WITH A CORRELATIVE REJECTION THEREIN OF ALL SIGNALS DIFFERING THEREFROM.
References Cited (Backward Citations)
US1994232A
Cited
US2569626A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-02-13 | 1970-08-15 | 1971-02-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-02-13 | 1974-08-15 | 1975-02-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-02-13 | 1978-08-15 | 1979-02-14 | $7700.00 | Window Closed / Lapsed |