Patent US4345020A successfully refreshed from Google Patents.
US3209288A
Expired / Lapsed
US
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Attenuator with constant phase shift effected by the compensatory insertion and removal of dielectric material
Assignee: North American Aviation Corp
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Filing: 1963-09-23
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Granted: 1965-09-28
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Expires: 1983-09-23
Abstract
No abstract record available.
Inventors
- 👤 Clinton E Bashore
- 👤 Jerry R Maes
- 👤 John L Sims
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 08:01
CPC Classifications
H; H01; H01P; H01P1/00; H01P1/22; H01P1/222
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
71 words
AN ATTENUATOR COMPRISING A SUBSTRATE OF DIELECTRIC MATERIAL; A CONFIGURATION OF LOSSY MATERIAL POSITIONED ON SAID SUBSTRATE; MEANS FOR VARIABLY INSERTING A PORTION OF SAID SUBSTRATE AND SAID CONFIGURATION INTO A WAVEGUIDE IN ORDER TO VARY THE ATTENUATION; AND MEANS FOR CORRESPONDINGLY VARIABLY INSERTING A PORTION OF SAID SUBSTRATE TO INTRODUCE A CHANGE OF PHASE-SHIFT THAT COMPENSATES FOR THE CHANGE OF PHASE-SHIFT INTRODUCED BY THE INSERTED PORTION OF SAID LOSSY MATERIAL.
Claim 2
Dependent Claim
71 words
AN ATTENUATOR COMPRISING A SUBSTRATE OF DIELECTRIC MATERIAL; A CONFIGURATION OF LOSSY MATERIAL POSITIONED ON SAID SUBSTRATE; MEANS FOR VARIABLY INSERTING A PORTION OF SAID SUBSTRATE AND SAID CONFIGURATION INTO A WAVEGUIDE IN ORDER TO VARY THE ATTENUATION; AND MEANS FOR CORRESPONDINGLY VARIABLY INSERTING A PORTION OF SAID SUBSTRATE TO INTRODUCE A CHANGE OF PHASE-SHIFT THAT COMPENSATES FOR THE CHANGE OF PHASE-SHIFT INTRODUCED BY THE INSERTED PORTION OF SAID LOSSY MATERIAL.
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) | 1968-09-27 | 1969-03-29 | 1969-09-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-09-27 | 1973-03-29 | 1973-09-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-09-27 | 1977-03-29 | 1977-09-28 | $7700.00 | Window Closed / Lapsed |