US3146413A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase shifter
Assignee: Lockheed Martin Corp
•
Filing: 1960-08-29
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Granted: 1964-08-25
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Expires: 1980-08-29
Abstract
No abstract record available.
Inventors
- 👤 Jesse L Butler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:26
CPC Classifications
H; H01; H01P; H01P3/00; H01P3/02; H01P3/08; H01P3/085; H01P1/00; H01P1/18; H01P1/184
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
122 words
A TRANSMISSION DEVICE OF VARIABLE ELECTRICAL LENGTH COMPRISING, IN COMBINATION, (A) A PAIR OF TRANSMISSION LINES, (B) A PAIR OF DIRECTIONAL COUPLERS, EACH DIRECTIONAL COUPLER INCLUDING A COUPLING SECTION OF EACH TRANSMISSION LINE, (C) SAID DIRECTIONAL COUPLERS BEING CONNECTED IN OVERLAPPING RELATIONSHIP ALONG THE TRANSMISSION LINES SO THAT ENERGY ENTERING SAID DEVICE ON ONE OF SAID TRANSMISSION LINES IS COUPLED IN THE SAME DIRECTION ON THE OTHER OF SAID LINES BY BOTH OF THE DIRECTIONAL COUPLERS, (D) SAID COUPLING SECTION OF EACH TRANSMISSION LINE HAVING AN INTERMEDIATE SECTION OF TRANSMISSION LINE SEPARATING SAID SECTIONS, AND (E) THE LENGTHS OF SAID INTERMEDIATE SECTIONS DIFFERING BY SUBSTANTIALLY N$, WHERE N IS ANY INTEGER INCLUDING ZERO AND $ IS THE WAVELENGTH OF THE OPERATING FREQUENCY.
Claim 2
Dependent Claim
122 words
A TRANSMISSION DEVICE OF VARIABLE ELECTRICAL LENGTH COMPRISING, IN COMBINATION, (A) A PAIR OF TRANSMISSION LINES, (B) A PAIR OF DIRECTIONAL COUPLERS, EACH DIRECTIONAL COUPLER INCLUDING A COUPLING SECTION OF EACH TRANSMISSION LINE, (C) SAID DIRECTIONAL COUPLERS BEING CONNECTED IN OVERLAPPING RELATIONSHIP ALONG THE TRANSMISSION LINES SO THAT ENERGY ENTERING SAID DEVICE ON ONE OF SAID TRANSMISSION LINES IS COUPLED IN THE SAME DIRECTION ON THE OTHER OF SAID LINES BY BOTH OF THE DIRECTIONAL COUPLERS, (D) SAID COUPLING SECTION OF EACH TRANSMISSION LINE HAVING AN INTERMEDIATE SECTION OF TRANSMISSION LINE SEPARATING SAID SECTIONS, AND (E) THE LENGTHS OF SAID INTERMEDIATE SECTIONS DIFFERING BY SUBSTANTIALLY N$, WHERE N IS ANY INTEGER INCLUDING ZERO AND $ IS THE WAVELENGTH OF THE OPERATING FREQUENCY.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |