US3401359A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Transistor switching modulators and demodulators
Assignee: AT&T Inc
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Filing: 1966-03-04
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Granted: 1968-09-10
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Expires: 1986-03-04
Abstract
No abstract record available.
Inventors
- 👤 Floyd K Becker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:53
CPC Classifications
H; H03; H03D; H03D7/00; H03D7/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
80 words
A SWITCHING CIRCUIT COMPRISING A MODULATING SIGNAL SOURCE HAVING A KNOWN INTERNAL RESISTANCE, A LOAD CIRCUIT HAVING A RESISTANCE MATCHING THAT OF SAID INTERNAL RESISTANCE, A CENTER-TAPPED INDUCTOR INTERCONNECTING SAID SOURCE AND SAID LOAD, A BRIDGING RESISTOR AT TWICE THE VALUE OF EITHER OF SAID SIGNAL SOURCE OR SAID LOAD CONNECTED ACROSS SAID INDUCTOR, A SOLID-STATE SWITCHING DEVICE HAVING ITS OUTPUT AND COMMON ELECTRODES CONNECTED BETWEEN SAID CENTER TAP AND A REFERENCE POINT SHARED WITH SAID SIGNAL SOURCE AND LOAD,
Claim 2
Dependent Claim
80 words
A SWITCHING CIRCUIT COMPRISING A MODULATING SIGNAL SOURCE HAVING A KNOWN INTERNAL RESISTANCE, A LOAD CIRCUIT HAVING A RESISTANCE MATCHING THAT OF SAID INTERNAL RESISTANCE, A CENTER-TAPPED INDUCTOR INTERCONNECTING SAID SOURCE AND SAID LOAD, A BRIDGING RESISTOR AT TWICE THE VALUE OF EITHER OF SAID SIGNAL SOURCE OR SAID LOAD CONNECTED ACROSS SAID INDUCTOR, A SOLID-STATE SWITCHING DEVICE HAVING ITS OUTPUT AND COMMON ELECTRODES CONNECTED BETWEEN SAID CENTER TAP AND A REFERENCE POINT SHARED WITH SAID SIGNAL SOURCE AND LOAD,
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) | 1971-09-10 | 1972-03-11 | 1972-09-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-09-10 | 1976-03-11 | 1976-09-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-09-10 | 1980-03-11 | 1980-09-10 | $7700.00 | Window Closed / Lapsed |