US3559069A
Expired / Lapsed
US
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Electronic pulse duration modulation devices using travelling field domain phenomena
Assignee: NAT RES DEV
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Filing: 1968-12-06
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Granted: 1971-01-26
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Expires: 1988-12-06
Abstract
Abstract IN A PLUSE DURATION MODULATION DEVICE TRAVELLING DOMAINS ARE NUCLEATED BY THE GUNN EFFECT OR THE LIKE AND THE PATH LENGTHS OF THE DOMAINS ARE VARIED TO VARY THE DURATION OF SIGNAL PULSES DERIVED FROM THE DOMAINS. IN ONE FORM THE DOMAINS ARE NUCLEATED IN RESPONSE TO PERIODIC TRIGGER PULSES AND THE DURATION MODULATED SIGNAL PULSES ARE UTILISED IN A PULSE PHASE MODULATOR DRIVING A PHASED AERIAL ARRAY.
Inventors
- 👤 Hans Ludwig Hartnagel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 03:09
CPC Classifications
H; H03; H03K; H03K7/00; H03K7/08
Claims Analysis
Total Claims: 0
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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) | 1974-01-25 | 1974-07-27 | 1975-01-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-25 | 1978-07-27 | 1979-01-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-25 | 1982-07-27 | 1983-01-26 | $7700.00 | Window Closed / Lapsed |