Patent US3123772A successfully refreshed from Google Patents.
US3123772A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rentiator
Assignee: —
•
Filing: —
•
Granted: 1964-03-03
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Expires: 1981-03-03
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:22
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/0218
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A METHOD FOR MEASURING REFRACTIVE INDEX COMPRISING AN EARTH SATELLITE TRANSMITTING ENERGY AT TWO FREQUENCIES, A PAIR OF RECEIVERS SITUATED ON THE EARTH AND TUNED RESPECTIVELY TO THE FREQUENCIES OF THE ENERGY FROM THE SATELLITE, A MULTIPLIER RECEIVING THE OUTPUT OF ONE OF THE RECEIVERS TO MULTIPLY IT BY A FACTOR EQUAL TO THE RATIO AT THE TRANSMITTED FREQUENCIES, A LOCAL OSCILLATOR, A PAIR OF MIXERS RECEIVING INPUTS FROM THE LOCAL OSCILLATOR, A PAIR OF OF SAID PAIR OF MIXERS RECEIVING THE OUTPUT OF THE MULTIPLIER, THE SECOND MIXER RECEIVING AN INPUT FROM THE SECOND RECEIVER AND MEANS FOR CONVERTING THE OUTPUTS OF SAID FIRST AND SECOND MIXERS INTO AN INDICATION OF THE REFRACTIVE INDEX OF THE IONOSPHERE.
Claim 2
Independent Claim
118 words
A METHOD FOR MEASURING REFRACTIVE INDEX COMPRISING AN EARTH SATELLITE TRANSMITTING ENERGY AT TWO FREQUENCIES, A PAIR OF RECEIVERS SITUATED ON THE EARTH AND TUNED RESPECTIVELY TO THE FREQUENCIES OF THE ENERGY FROM THE SATELLITE, A MULTIPLIER RECEIVING THE OUTPUT OF ONE OF THE RECEIVERS TO MULTIPLY IT BY A FACTOR EQUAL TO THE RATIO AT THE TRANSMITTED FREQUENCIES, A LOCAL OSCILLATOR, A PAIR OF MIXERS RECEIVING INPUTS FROM THE LOCAL OSCILLATOR, A PAIR OF OF SAID PAIR OF MIXERS RECEIVING THE OUTPUT OF THE MULTIPLIER, THE SECOND MIXER RECEIVING AN INPUT FROM THE SECOND RECEIVER AND MEANS FOR CONVERTING THE OUTPUTS OF SAID FIRST AND SECOND MIXERS INTO AN INDICATION OF THE REFRACTIVE INDEX OF THE IONOSPHERE.
References Cited (Backward Citations)
US2900595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-03-03 | 1967-09-02 | 1968-03-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-03-03 | 1971-09-02 | 1972-03-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-03-03 | 1975-09-02 | 1976-03-03 | $7700.00 | Window Closed / Lapsed |