US3158027A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electronic thermometer
Assignee: AT&T Inc
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Filing: 1961-07-05
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Granted: 1964-11-24
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Expires: 1981-07-05
Abstract
No abstract record available.
Inventors
- 👤 Lynden U Kibler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:44
CPC Classifications
G; G01; G01K; G01K1/00; G01K1/02; G01K1/024
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
72 words
AN OSCILLATOR FOR CONVERTING TEMPERATURE CHANGES INTO FREQUENCY CHANGES COMPRISING A TUNNEL DIODE, A THERMALLY SENSITIVE RESISTOR AND A BLOCKING CAPACITOR SERIALLY CONNECTED IN SHUNT WITH SAID TUNNEL DIODE, AN INDUCTANCE CONNECTED IN A PATH WHICH SHUNTS SAID TUNNEL DIODE, SAID INDUCTANCE BEING RESONANT WITH THE JUNCTION CAPACITANCE OF SAID TUNNEL DIODE AT THE UPPER FREQUENCY LIMIT OF OPERATION, AND DIRECT-CURRENT MEANS FOR BIASING SAID TUNNEL DIODE TO ITS NEGATIVE RESISTANCE REGION.
Claim 2
Dependent Claim
72 words
AN OSCILLATOR FOR CONVERTING TEMPERATURE CHANGES INTO FREQUENCY CHANGES COMPRISING A TUNNEL DIODE, A THERMALLY SENSITIVE RESISTOR AND A BLOCKING CAPACITOR SERIALLY CONNECTED IN SHUNT WITH SAID TUNNEL DIODE, AN INDUCTANCE CONNECTED IN A PATH WHICH SHUNTS SAID TUNNEL DIODE, SAID INDUCTANCE BEING RESONANT WITH THE JUNCTION CAPACITANCE OF SAID TUNNEL DIODE AT THE UPPER FREQUENCY LIMIT OF OPERATION, AND DIRECT-CURRENT MEANS FOR BIASING SAID TUNNEL DIODE TO ITS NEGATIVE RESISTANCE REGION.
References Cited (Backward Citations)
US2588882A
Cited
US3040188A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-11-24 | 1968-05-25 | 1968-11-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-11-24 | 1972-05-25 | 1972-11-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-11-24 | 1976-05-25 | 1976-11-24 | $7700.00 | Window Closed / Lapsed |