Patent US3089101A successfully refreshed from Google Patents.
Patent US3309628A successfully refreshed from Google Patents.
US3309628A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Yig broadband variable acoustic delay line
Assignee: Teledyne Inc
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Filing: 1965-05-07
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Granted: 1967-03-14
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Expires: 1985-05-07
Abstract
No abstract record available.
Inventors
- 👤 Frank A Olson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 16:58
CPC Classifications
H; H03; H03H; H03H9/00; H03H9/02; H03H9/125; H03H9/30; H03H9/38
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
176 words
A BROADBAND MICROWAVE VARIABLE DELAY APPARATUS COMPRISING: MEANS FOR PROPAGATING ACOUSTIC WAVES INCLUDING A FERRIMAGNETIC SINGLE CRYSTAL MATERIAL; INPUT COUPLING MEANS FOR COUPLING AN INPUT MICROWAVE SIGNAL TO AN INPUT REGION OF SAID MATERIAL FOR ESTABLISHING AN ACOUSTIC WAVE PROPAGATING WITHIN SAID MATERIAL; OUTPUT COUPLING MEANS FOR SETTING UP AN OUTPUT MICROWAVE SIGNAL FROM SAID PROPAGATING ACOUSTIC WAVE AT AN OUTPUT REGION OF SAID MATERIAL SPACED FROM SAID INPUT REGION; AT LEAST ONE OF SAID INPUT AND OUTPUT COUPLING MEANS, INCLUDING MEANS FOR ESTABLISHING A MAGNETIC FIELD WITH A STEEP STEP IN THE MAGNETIC FIELD STRENGTH WITHIN SAID MATERIAL IN THE REGION OF SAID ONE COUPLING TO CAUSE CONVERSION BETWEEN AN ACOUSTIC WAVE AND A SPIN WAVE AND BETWEEN SPIN WAVE AND A MICROWAVE SIGNAL; AND MEANS FOR MOVING THE STEEP STEP MAGNETIC FIELD IN SAID ONE COUPLING MEANS LONGITUDINALLY OF SAID MATERIAL TO CHANGE THE EFFECTIVE PATH LENGTH OF SAID ACOUSTIC WAVE FROM SAID INPUT REGION TO SAID OUTPUT REGION FOR VARYING THE TIME DELAY BETWEEN SAID INPUT MICROWAVE SIGNAL AND SAID OUTPUT MICROWAVE SIGNAL.
Claim 2
Dependent Claim
176 words
A BROADBAND MICROWAVE VARIABLE DELAY APPARATUS COMPRISING: MEANS FOR PROPAGATING ACOUSTIC WAVES INCLUDING A FERRIMAGNETIC SINGLE CRYSTAL MATERIAL; INPUT COUPLING MEANS FOR COUPLING AN INPUT MICROWAVE SIGNAL TO AN INPUT REGION OF SAID MATERIAL FOR ESTABLISHING AN ACOUSTIC WAVE PROPAGATING WITHIN SAID MATERIAL; OUTPUT COUPLING MEANS FOR SETTING UP AN OUTPUT MICROWAVE SIGNAL FROM SAID PROPAGATING ACOUSTIC WAVE AT AN OUTPUT REGION OF SAID MATERIAL SPACED FROM SAID INPUT REGION; AT LEAST ONE OF SAID INPUT AND OUTPUT COUPLING MEANS, INCLUDING MEANS FOR ESTABLISHING A MAGNETIC FIELD WITH A STEEP STEP IN THE MAGNETIC FIELD STRENGTH WITHIN SAID MATERIAL IN THE REGION OF SAID ONE COUPLING TO CAUSE CONVERSION BETWEEN AN ACOUSTIC WAVE AND A SPIN WAVE AND BETWEEN SPIN WAVE AND A MICROWAVE SIGNAL; AND MEANS FOR MOVING THE STEEP STEP MAGNETIC FIELD IN SAID ONE COUPLING MEANS LONGITUDINALLY OF SAID MATERIAL TO CHANGE THE EFFECTIVE PATH LENGTH OF SAID ACOUSTIC WAVE FROM SAID INPUT REGION TO SAID OUTPUT REGION FOR VARYING THE TIME DELAY BETWEEN SAID INPUT MICROWAVE SIGNAL AND SAID OUTPUT MICROWAVE SIGNAL.
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) | 1970-03-13 | 1970-09-12 | 1971-03-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-03-13 | 1974-09-12 | 1975-03-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-03-13 | 1978-09-12 | 1979-03-14 | $7700.00 | Window Closed / Lapsed |