US3382379A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase shifter
Assignee: Ampex Corp
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Filing: 1964-03-30
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Granted: 1968-05-07
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Expires: 1984-03-30
Abstract
No abstract record available.
Inventors
- 👤 William F Lawless
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 05:54
CPC Classifications
H; H03; H03H; H03H11/00; H03H11/02; H03H11/16; G; G05; G05D; G05D3/00; G05D3/12; G05D3/14; G05D3/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
81 words
A PHASE SHIFTER FOR PRODUCING AN OUTPUT PULSE IN RESPONSE TO A VARYING AMPLITUDE WAVEFORM AND A PHASE CHANGE SIGNAL, COMPRISING: MEANS FOR VARYING THE LEVEL OF THE VARYING AMPLITUDE WAVEFORM IN RESPONSE TO THE PHASE CHANGE SIGNAL, AND MEANS FOR SWITCHING ALTERNATELY BETWEEN ONE VOLTAGE AND ANOTHER IN RESPONSE TO THE CROSSING OF A CERTAIN REFERENCE LEVEL BY THE LEVEL-VARIED VARYING AMPLITUDE WAVEFORM THEREBY SIMULTANEOUSLY PROVIDING ISOLATION BETWEEN SAID SIGNAL AND SAID WAVEFORM WHILE IN ONE OF SAID VOLTAGE LEVELS.
Claim 2
Dependent Claim
81 words
A PHASE SHIFTER FOR PRODUCING AN OUTPUT PULSE IN RESPONSE TO A VARYING AMPLITUDE WAVEFORM AND A PHASE CHANGE SIGNAL, COMPRISING: MEANS FOR VARYING THE LEVEL OF THE VARYING AMPLITUDE WAVEFORM IN RESPONSE TO THE PHASE CHANGE SIGNAL, AND MEANS FOR SWITCHING ALTERNATELY BETWEEN ONE VOLTAGE AND ANOTHER IN RESPONSE TO THE CROSSING OF A CERTAIN REFERENCE LEVEL BY THE LEVEL-VARIED VARYING AMPLITUDE WAVEFORM THEREBY SIMULTANEOUSLY PROVIDING ISOLATION BETWEEN SAID SIGNAL AND SAID WAVEFORM WHILE IN ONE OF SAID VOLTAGE LEVELS.
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) | 1971-05-07 | 1971-11-06 | 1972-05-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-07 | 1975-11-06 | 1976-05-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-07 | 1979-11-06 | 1980-05-07 | $7700.00 | Window Closed / Lapsed |