Patent US3249896A successfully refreshed from Google Patents.
US3249896A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Frequency-shift data transmitter
Assignee: AT&T Inc
•
Filing: 1963-11-01
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Granted: 1966-05-03
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Expires: 1983-11-01
Abstract
No abstract record available.
Inventors
- 👤 William E Baker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:42
CPC Classifications
H; H04; H04L; H04L27/00; H04L27/10; H04L27/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A RESONANT CIRCUIT FOR A FREQUENCY-SHIFT OSCILLATOR COMPRISING CAPACITIVE MEANS, FIRST AND SECOND COIL PORTIONS COUPLED ON A COMMON CORE, A TRANSISTOR SWITCH ASSOCIATED WITH EACH OF SAID COILS PORTIONS OR COMPLETING A PATH THERETHROUGH CONNECTING SAID A SSOCIATED COIL PORTION ACROSS SAID CAPACITIVE MEANS, AND A BREAKDOWN DEVICE CONNECTED ACROSS SAID TRANSISTOR SWITCH PATH.
Claim 2
Dependent Claim
55 words
A RESONANT CIRCUIT FOR A FREQUENCY-SHIFT OSCILLATOR COMPRISING CAPACITIVE MEANS, FIRST AND SECOND COIL PORTIONS COUPLED ON A COMMON CORE, A TRANSISTOR SWITCH ASSOCIATED WITH EACH OF SAID COILS PORTIONS OR COMPLETING A PATH THERETHROUGH CONNECTING SAID A SSOCIATED COIL PORTION ACROSS SAID CAPACITIVE MEANS, AND A BREAKDOWN DEVICE CONNECTED ACROSS SAID TRANSISTOR SWITCH PATH.
References Cited (Backward Citations)
US2230557A
Cited
US2617035A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |