US3156883A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Step frequency oscillator with semiconductor switching
Assignee: AT&T Inc
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Filing: 1961-11-21
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Granted: 1964-11-10
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Expires: 1981-11-21
Abstract
No abstract record available.
Inventors
- 👤 George W Wells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:41
CPC Classifications
H; H03; H03K; H03K17/00; H03K17/51; H03K17/56; H03K17/72; H03K17/725; H03M; H03M1/00; H04; H04M; H04M1/00; H04M1/26; H04M1/30; H04M1/50; H03M1/12; H03M1/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
112 words
A SYSTEM FOR CONVERTING PULSE SIGNALS INTO TONE SIGNALS, COMPRISING A SOURCE OF INFORMATION PULSE SIGNALS, AN OSCILLATOR HAVING A TUNING CAPACITANCE AND A TUNING INDUCTANCE AND MEANS FOR VARYING ITS OUTPUT FREQUENCY IN RESPONSE TO SAID INFORMATION PULSE SIGNALS, MEANS FOR PRODUCING TIMING SIGNALS AT PREDETERMINED TIMES BETWEEN SAID INFORMATION PULSE SIGNALS, MEANS FOR APPLYING SAID TIMING SIGNALS TO SHORT OUT ONE OF SAID TUNING CAPACITANCE AND SAID TUNING INDUCTANCE OF SAID OSCILLATOR TO TERMINATE OSCILLATIONS OF SAID OSCILLATOR, AND A COORDINATED SWITCHING ARRANGEMENT ADAPTED IN RESPONSE TO ONE OF SAID INFORMATION PULSE SIGNALS SIMULTANEOUSLY TO UNSHORT SAID ONE OF SAID CAPACITANCE AND SAID INDUCTANCE AND TO SELECT SAID OUTPUT FREQUENCY.
Claim 2
Independent Claim
112 words
A SYSTEM FOR CONVERTING PULSE SIGNALS INTO TONE SIGNALS, COMPRISING A SOURCE OF INFORMATION PULSE SIGNALS, AN OSCILLATOR HAVING A TUNING CAPACITANCE AND A TUNING INDUCTANCE AND MEANS FOR VARYING ITS OUTPUT FREQUENCY IN RESPONSE TO SAID INFORMATION PULSE SIGNALS, MEANS FOR PRODUCING TIMING SIGNALS AT PREDETERMINED TIMES BETWEEN SAID INFORMATION PULSE SIGNALS, MEANS FOR APPLYING SAID TIMING SIGNALS TO SHORT OUT ONE OF SAID TUNING CAPACITANCE AND SAID TUNING INDUCTANCE OF SAID OSCILLATOR TO TERMINATE OSCILLATIONS OF SAID OSCILLATOR, AND A COORDINATED SWITCHING ARRANGEMENT ADAPTED IN RESPONSE TO ONE OF SAID INFORMATION PULSE SIGNALS SIMULTANEOUSLY TO UNSHORT SAID ONE OF SAID CAPACITANCE AND SAID INDUCTANCE AND TO SELECT SAID OUTPUT FREQUENCY.
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) | 1967-11-10 | 1968-05-11 | 1968-11-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-10 | 1972-05-11 | 1972-11-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-10 | 1976-05-11 | 1976-11-10 | $7700.00 | Window Closed / Lapsed |