Patent US3210685A successfully refreshed from Google Patents.
US3210685A
Expired / Lapsed
US
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Cross-coupled crystal-controlled square wave oscillator
Assignee: AT&T Inc
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Filing: 1962-04-25
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Granted: 1965-10-05
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Expires: 1982-04-25
Abstract
No abstract record available.
Inventors
- 👤 Stanley R Zepp
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 10:17
CPC Classifications
H; H03; H03K; H03K3/00; H03K3/02; H03K3/26; H03K3/28; H03K3/281; H03K3/282; H03K3/283
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
76 words
AN OSCILLATOR COMPRISING A HIGH GAIN, LOW PHASE SHIFT AMPLIFIER MEANS INCLUDING INPUT AND OUTPUT TERMINALS, A SERIES RESONANT CRYSTAL CONNECTED BETWEEN SAID AMPLIFIER INPUT AND OUTPUT TERMINALS, A PARALLEL RESONANT CIRCUIT INCLUDING FIRST AND SECOND TERMINALS, AND MEANS CONDUCTIVE TO DIRECT CURRENT INCLUDED IN SAID AMPLIFIER MEANS FOR SUPPLYING NEGATIVE FEEDBACK TO SAID FIRST TERMINAL OF SAID PARALLEL RESONANT CIRCUIT, SAID SECOND TERMINAL OF SAID PARALLEL RESONANT CIRCUIT BEING CONNECTED TO SAID AMPLIFIER INPUT TERMINAL.
References Cited (Backward Citations)
GB428581A
Cited
US2303862A
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US2625650A
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US2960666A
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US2903650A
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US2980865A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-10-04 | 1969-04-05 | 1969-10-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-10-04 | 1973-04-05 | 1973-10-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-10-04 | 1977-04-05 | 1977-10-05 | $7700.00 | Window Closed / Lapsed |