US3386041A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Demodulator circuit for period modulated signals
Assignee: Bell and Howell Co
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Filing: 1965-07-26
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Granted: 1968-05-28
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Expires: 1985-07-26
Abstract
No abstract record available.
Inventors
- 👤 Norton W Bell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 10:57
CPC Classifications
H; H03; H03K; H03K9/00; H03K9/06; H03D; H03D3/00; H03D3/02; H03D3/04
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
86 words
A DEMODULATOR COMPRISING FIRST AND SECOND TRANSISTORS EACH HAVING BASE, EMITTER AND COLLECTOR ELECTRODES, MEANS CONNECTING THE COLLECTOR ELECTRODES TO ONE END OF A POTENTIAL SOURCE, RESISTOR MEANS CONNECTING THE EMITTER OF THE FIRST TRANSISTOR AND THE EMITTER OF THE SECOND TRANSISTOR TO THE OTHER END OF THE POTENTIAL SOURCE, A REACTIVE IMPEDANCE CONNECTED BETWEEN THE TWO EMITTER ELECTRODES, A LOW-PASS FILTER COUPLED TO THE COLLECTOR ELECTRODES FOR DERIVING A DEMODULATED OUTPUT SIGNAL THROUGH THE FILTER, AND MEANS FOR APPLYING A PAIR OF TIME MODULATED SQUARE
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) | 1971-05-28 | 1971-11-27 | 1972-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-05-28 | 1975-11-27 | 1976-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-05-28 | 1979-11-27 | 1980-05-28 | $7700.00 | Window Closed / Lapsed |