Patent US3090044A successfully refreshed from Google Patents.
US3090044A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Radio direction finding systems
Assignee: Individual
•
Filing: 1958-05-02
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Granted: 1963-05-14
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Expires: 1978-05-02
Abstract
No abstract record available.
Inventors
- 👤 Raymond M Wilmotte
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:57
CPC Classifications
G; G01; G01S; G01S3/00; G01S3/02; G01S3/14
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
74 words
APPARATUS FOR DETERMINING THE DIRECTION OF A TARGET OR A SOURCE OF WIDE FREQUENCY BAND RADIO WAVES COMPRISING A PAIR OF SPACED ANTENNAS, ONE OF SAID ANTENNAS BEING A FREQUENCY SENSITIVE ANTENNA HAVING A RADIATION PATTERN WHICH IS A FUNCTION OF THE FREQUENCY OF THE RECEIVED WAVE, AND MEANS CONNECTED TO SAID ANTENNAS FOR ANALYZING THE SPECTRA OF THE SIGNALS RECEIVED BY BOTH ANTENNAS AND DETERMINING THE DIRECTION OF ARRIVAL OF SAID RADIO WAVES.
Claim 2
Dependent Claim
74 words
APPARATUS FOR DETERMINING THE DIRECTION OF A TARGET OR A SOURCE OF WIDE FREQUENCY BAND RADIO WAVES COMPRISING A PAIR OF SPACED ANTENNAS, ONE OF SAID ANTENNAS BEING A FREQUENCY SENSITIVE ANTENNA HAVING A RADIATION PATTERN WHICH IS A FUNCTION OF THE FREQUENCY OF THE RECEIVED WAVE, AND MEANS CONNECTED TO SAID ANTENNAS FOR ANALYZING THE SPECTRA OF THE SIGNALS RECEIVED BY BOTH ANTENNAS AND DETERMINING THE DIRECTION OF ARRIVAL OF SAID RADIO WAVES.
References Cited (Backward Citations)
US2140130A
Cited
US2166991A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1966-05-13 | 1966-11-12 | 1967-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-05-13 | 1970-11-12 | 1971-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-05-13 | 1974-11-12 | 1975-05-14 | $7700.00 | Window Closed / Lapsed |