US3139596A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Phase modulation by nonlinear voltagesensitive capacitor with preservation of modulation index
Assignee: AT&T Inc
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Filing: 1962-05-09
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Granted: 1964-06-30
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Expires: 1982-05-09
Abstract
No abstract record available.
Inventors
- 👤 Alfred E Johanson
- 👤 Thomas L Powers
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 23:41
CPC Classifications
H; H03; H03C; H03C3/00; H03C3/10; H03C3/12; H03C3/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
78 words
IN A PHASE MODULATION SYSTEM, A SOURCE OF A CARRIER WAVE OF PREASSIGNED AMPLITUDE AND FREQUENCY, A LOAD, A PHASE-SHIFT NETWORK COUPLED IN TANDEM BETWEEN SAID SOURCE AND SAID LOAD, SAID NETWORK INCLUDING A VOLTAGE-SENSITIVE ELEMENT HAVING AN IMPEDANCE Z AND BEING PROPORTIONED TO PRESENT TO SAID SOURCE A TRANSFER RATIO OF WHICH THE PHASE ANGLE VARIES IN CONFORMANCE WITH CHANGES IN THE IMPEDANCE OF THE ELEMENT, SAID ELEMENT HAVING A SINGLE CONTROL TERMINAL AND A NONLINEAR CHARACTERISTIC
Claim 2
Dependent Claim
78 words
IN A PHASE MODULATION SYSTEM, A SOURCE OF A CARRIER WAVE OF PREASSIGNED AMPLITUDE AND FREQUENCY, A LOAD, A PHASE-SHIFT NETWORK COUPLED IN TANDEM BETWEEN SAID SOURCE AND SAID LOAD, SAID NETWORK INCLUDING A VOLTAGE-SENSITIVE ELEMENT HAVING AN IMPEDANCE Z AND BEING PROPORTIONED TO PRESENT TO SAID SOURCE A TRANSFER RATIO OF WHICH THE PHASE ANGLE VARIES IN CONFORMANCE WITH CHANGES IN THE IMPEDANCE OF THE ELEMENT, SAID ELEMENT HAVING A SINGLE CONTROL TERMINAL AND A NONLINEAR CHARACTERISTIC
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) | 1967-06-30 | 1967-12-30 | 1968-06-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-30 | 1971-12-30 | 1972-06-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-30 | 1975-12-30 | 1976-06-30 | $7700.00 | Window Closed / Lapsed |