Patent US3259899A successfully refreshed from Google Patents.
US3259899A
Expired / Lapsed
US
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Nondegenerate multimode tracking system
Assignee: AT&T Inc
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Filing: 1963-12-24
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Granted: 1966-07-05
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Expires: 1983-12-24
Abstract
No abstract record available.
Inventors
- 👤 John S Cook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 23:49
CPC Classifications
G; G01; G01S; G01S13/00; G01S13/02; G01S13/06; G01S13/42; G01S13/44; G01S13/4409
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
105 words
A TRACKING SYSTEM OF THE SIMULTANEOUS LOBE COMPARISON TYPE WHICH COMPRISES MEANS FOR RECEIVING A SIGNAL OF ARBITRARY POLARIZATION IN A WAVEGUIDE, MEANS FOR SAMPLING SAID SIGNAL TO DEVELOP THEREFROM A PAIR OF QUADRATURE COMPONENT SIGNALS OF A DOMINANT WAVEGUDIE MODE AND SIGNALS EXCITED IN AT LEAST TWO HIGHER ORDER WAVEGUIDE MODES, MEANS FOR RESPECTIVELY COMPARING EACH OF SAID HIGHER ORDER MODE SIGNALS WITH EACH OF SAID QUADRATURE SIGNAL COMPONENTS TO DEVELOP PRODUCT SIGNALS, AND MEANS FOR SELECTIVELY COMBINING SAID PRODUCT SIGNALS TO DEVELOP A PAIR OF ERROR SIGNALS THAT REPRESENT THE DIRECTION OF RECEPTION OF SAID ARBITRARILY POLARIZED SIGNAL WITH RESPECT TO SAID SYSTEM.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-07-04 | 1970-01-03 | 1970-07-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-07-04 | 1974-01-03 | 1974-07-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-07-04 | 1978-01-03 | 1978-07-05 | $7700.00 | Window Closed / Lapsed |