Patent US3357021A successfully refreshed from Google Patents.
US3357021A
Expired / Lapsed
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Polarization characteristics measuring system
Assignee: Individual
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Filing: 1966-05-31
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Granted: 1967-12-05
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Expires: 1986-05-31
Abstract
No abstract record available.
Inventors
- 👤 Philip J Allen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 22:05
CPC Classifications
G; G01; G01R; G01R29/00; G01R29/08; G01R29/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
144 words
A SYSTEM FOR RECEIVING A POLARIZED WAVE OF FREQUENCY F0 COMPRISING: A ROTATABLE LINEARLY POLARIZED ANTENNA FOR RECEIVING SAID POLARIZED WAVE WHILE ROTATING AT A FREQUENCY F3, FREQUENCY TRANSLATING MEANS FOR RECEIVING A PORTION OF SAID POLARIZED WAVE OF FREQUENCY F0 AND FOR TRANSLATING IT TO A SIGNAL OF FREQUENCY F4, A MIXER FOR RECEIVING SIDEBAND SIGNALS F1 AND F2 WHICH ARE PROPORTIONAL IN AMPLITUDE AND PHASE TO THE POLARIZATION COMPONENTS OF SAID RECEIVED WAVE AND WHEREIN THE SIGNALS F1 AND F2 ARE EACH SHIFTED AN AMOUNT F3 FROM THE CARRIER FREQUENCY F0, SAID F1 AND F2 SIGNALS BEING MIXED WITH SAID F4 SIGNALS TO DERIVE BEAT FREQUENCIES F5 AND F6 WHICH AREA PROPORTIONAL IS AMPLITUDE AND PHASE TO THE F1 AND F2 SIGNALS, RESPECTIVELY, AN AMPLIFIER COUPLED TO SAID MIXER FOR AMPLIFYING F5 AND F6, AND FILTER MEANS FOR SEPARATING F5 AND F6.
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) | 1970-12-04 | 1971-06-05 | 1971-12-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-12-04 | 1975-06-05 | 1975-12-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-12-04 | 1979-06-05 | 1979-12-05 | $7700.00 | Window Closed / Lapsed |