Patent US3274516A successfully refreshed from Google Patents.
US3274516A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Ferrite devices for the modulation and switching of microwaves
Assignee: US Philips Corp
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Filing: 1965-05-25
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Granted: 1966-09-20
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Expires: 1985-05-25
Abstract
No abstract record available.
Inventors
- 👤 Neckenburger Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 23:23
CPC Classifications
H; H03; H03C; H03C7/00; H03C7/02; H03C7/022; H01; H01P; H01P1/00; H01P1/18; H01P1/19; H01P1/22; H01P1/23
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
130 words
A MODULATION DEVICE FOR HIGH FREQUENCY WAVES COMPRISING A FERRITE BAR, A SOURCE OF MICROWAVE ENERGY, MEANS APPLYING SAID MICROWAVE ENERGY TO SAID BAR, A MODULATING COIL SURROUNDING SAID BAR FOR PROVIDING A LONGITUDINAL MAGNETIC FIELD IN SAID BAR, A CONDUCTING PLATE EXTENDING PARALLEL TO SAID BAR INSIDE FIRST AND SPACED FROM SAID BAR, SAID PLATE COMPRISING THE SOLE CONDUCTIVE MEANS BETWEEN SAID COIL AND BAR, SAID FIRST AND SECOND RECTANGULAR WAVEGUIDE SECTIONS POSITIONED COAXIALLY WITH SAID BAR, SAID PLATE FORMING AN EXTENSION OF ONE WALL OF EACH OF SAID WAVEGUIDE SECTIONS, SAID BAR HAVING SUFFICIENTLY LARGE CROSSSECTIONAL DIMENSIONS THAT SAID ENERGY IS CONDUCTED DIELECTRICALLY WITHOUT SUBSTANTIAL TRANSVERSE FIELD EXTENSION AND SUFFICIENTLY SMALL CROSS-SECTIONAL DIMENSIONS THAT SAID PLATE SUBSTANTIALLY PREVENTS ROTATION OF THE POLARIZATION PLANE OF WAVES IN SAID BAR.
Claim 2
Dependent Claim
130 words
A MODULATION DEVICE FOR HIGH FREQUENCY WAVES COMPRISING A FERRITE BAR, A SOURCE OF MICROWAVE ENERGY, MEANS APPLYING SAID MICROWAVE ENERGY TO SAID BAR, A MODULATING COIL SURROUNDING SAID BAR FOR PROVIDING A LONGITUDINAL MAGNETIC FIELD IN SAID BAR, A CONDUCTING PLATE EXTENDING PARALLEL TO SAID BAR INSIDE FIRST AND SPACED FROM SAID BAR, SAID PLATE COMPRISING THE SOLE CONDUCTIVE MEANS BETWEEN SAID COIL AND BAR, SAID FIRST AND SECOND RECTANGULAR WAVEGUIDE SECTIONS POSITIONED COAXIALLY WITH SAID BAR, SAID PLATE FORMING AN EXTENSION OF ONE WALL OF EACH OF SAID WAVEGUIDE SECTIONS, SAID BAR HAVING SUFFICIENTLY LARGE CROSSSECTIONAL DIMENSIONS THAT SAID ENERGY IS CONDUCTED DIELECTRICALLY WITHOUT SUBSTANTIAL TRANSVERSE FIELD EXTENSION AND SUFFICIENTLY SMALL CROSS-SECTIONAL DIMENSIONS THAT SAID PLATE SUBSTANTIALLY PREVENTS ROTATION OF THE POLARIZATION PLANE OF WAVES IN SAID BAR.
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) | 1969-09-19 | 1970-03-21 | 1970-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-09-19 | 1974-03-21 | 1974-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-09-19 | 1978-03-21 | 1978-09-20 | $7700.00 | Window Closed / Lapsed |