Patent US3519985A successfully refreshed from Google Patents.
US3519985A
Expired / Lapsed
US
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Random modulation obstacle locator system
Assignee: ROBERT M PAGE
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Filing: 1955-04-12
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Granted: 1970-07-07
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Expires: 1975-04-12
Abstract
No abstract record available.
Inventors
- 👤 Robert M Page
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 21:34
CPC Classifications
G; G01; G01S; G01S15/00; G01S15/02; G01S15/50; G01S15/58; G01S15/586; G01S1/00; G01S1/72; Y; Y10; Y10S; Y10S367/00; Y10S367/901; Y10S367/904
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
IN A SYSTEM FOR DETECTING OBJECTS DISPOSED IN AN ENERGY PROPAGATIONAL MEDIUM, TRANSMISSION MEANS FOR DELIVERING OSCILLATORY ENERGY INTO THE MEDIUM, A FREQUENCY MODULATION MEANS COUPLED TO SAID TRANSMISSION MEANS FOR MODULATING SAID OSCILLATORY ENERGY AT A NON-UNIFORMLY VARYING FREQUENCY, RECEPTION MEANS FOR INTERCEPTING OSCILLATORY ENERGY IN THE MEDIUM REFLECTED FROM OBJECTS LOCATED IN THE MEDIUM, STORAGE MEANS RETAINING FOR A PERIOD OF TIME THE DELIVERED ENERGY AND THE INTERCEPTED RETURN ENERGY, PLAYBACK CONTROL MEANS CONNECTED TO THE STORAGE MEANS OPERATIVE TO CONTROL THE REPRODUCTION OF STORED SIGNALS IN VARIABLE TIME RELATIONSHIP TO SECURE A SELECTED FREQUENCY DIFFERENCE BETWEEN THE REPRODUCED DELIVERED ENERGY AND THE REPRODUCED INTERCEPTED ENERGY FOR SELECTED RANGE, AND A NARROW BANDWIDTH INTERMEDIATE FREQUENCY AMPLIFIER RESPONSIVE TO THE SELECTED FREQUENCY DIFFERENCE TO AMPLIFY SIGNALS AT THAT FREQUENCY.
Claim 2
Dependent Claim
130 words
IN A SYSTEM FOR DETECTING OBJECTS DISPOSED IN AN ENERGY PROPAGATIONAL MEDIUM, TRANSMISSION MEANS FOR DELIVERING OSCILLATORY ENERGY INTO THE MEDIUM, A FREQUENCY MODULATION MEANS COUPLED TO SAID TRANSMISSION MEANS FOR MODULATING SAID OSCILLATORY ENERGY AT A NON-UNIFORMLY VARYING FREQUENCY, RECEPTION MEANS FOR INTERCEPTING OSCILLATORY ENERGY IN THE MEDIUM REFLECTED FROM OBJECTS LOCATED IN THE MEDIUM, STORAGE MEANS RETAINING FOR A PERIOD OF TIME THE DELIVERED ENERGY AND THE INTERCEPTED RETURN ENERGY, PLAYBACK CONTROL MEANS CONNECTED TO THE STORAGE MEANS OPERATIVE TO CONTROL THE REPRODUCTION OF STORED SIGNALS IN VARIABLE TIME RELATIONSHIP TO SECURE A SELECTED FREQUENCY DIFFERENCE BETWEEN THE REPRODUCED DELIVERED ENERGY AND THE REPRODUCED INTERCEPTED ENERGY FOR SELECTED RANGE, AND A NARROW BANDWIDTH INTERMEDIATE FREQUENCY AMPLIFIER RESPONSIVE TO THE SELECTED FREQUENCY DIFFERENCE TO AMPLIFY SIGNALS AT THAT FREQUENCY.
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) | 1973-07-06 | 1974-01-05 | 1974-07-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1977-07-06 | 1978-01-05 | 1978-07-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1981-07-06 | 1982-01-05 | 1982-07-07 | $7700.00 | Window Closed / Lapsed |