Patent US3114900A successfully refreshed from Google Patents.
US3071676A
Expired / Lapsed
US
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Temperature controlled oven
Assignee: General Dynamics Corp
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Filing: 1961-01-13
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Granted: 1963-01-01
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Expires: 1981-01-13
Abstract
No abstract record available.
Inventors
- 👤 Johannes Van Sandwyk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:04
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
128 words
IN COMBINATION WITH AN OVEN THE TEMPERATURE OF WHICH IS TO BE CONTROLLED, AN ALTERNATING CURRENT AMPLIFIER COMPRISING TWO DIRECTLY COUPLED CASCADED TRANSISTORS, THE SECOND OF SAID CASCADED TRANSISTORS HAVING AN EMITTER-FOLLOWER RESISTOR TO STABILIZE THE GAIN OF SAID TRANSISTOR WITH CHANGING AMBIENT TEMPERATURES, A RESONANT TANK CIRCUIT COUPLED IN THE OUTPUT OF SAID SECOND TRANSISTOR, A WINDING WITH AN INTERMEDIATE TAP INDUCTIVELY COUPLED TO THE INDUCTANCE OF SAID TANK CIRCUIT, TWO RESISTORS OF DIFFERENT COEFFICIENT OF RESISTANCE COUPLED, RESPECTIVELY, BETWEEN THE TERMINALS OF SAID WINDING AND THE INPUT OF THE FIRST OF SAID CASCADED TRANSISTORS, SAID INTERMEDIATE TAP BEING CONNECTED TO AN INTERMEDIATE POINT ON SAID EMITTER-FOLLOWER RESISTANCE TO APPLY A VARIABLE BIAS ON SAID INPUT ELECTRODE, A RECTIFIER TRANSISTOR COUPLED TO SAID TANK CIRCUIT, A POWER
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) | 1965-12-31 | 1966-07-02 | 1967-01-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-12-31 | 1970-07-02 | 1971-01-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-12-31 | 1974-07-02 | 1975-01-01 | $7700.00 | Window Closed / Lapsed |