Patent EP0214721A1 successfully refreshed from Google Patents.
Patent US3320407A successfully refreshed from Google Patents.
US3320407A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid state temperature control
Assignee: Individual
•
Filing: 1961-03-27
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Granted: 1967-05-16
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Expires: 1981-03-27
Abstract
No abstract record available.
Inventors
- 👤 Julian C Holmes
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 14:23
CPC Classifications
G; G05; G05D; G05D23/00; G05D23/19; G05D23/20; G05D23/24; G05D23/1906
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
136 words
A SOLID STATE NETWORK FOR CONTROLLING THE TEMPERATURE OF AN ENCLOSURE WITHIN LESS THAN ONE-TENTH DEGREE OF A SELECTED TEMPERATURE COMPRISING TEMPERATURE SENSING MEANS AND RESISTANCE MEANS CONNECTED IN SERIES THEREWITH, SAID TEMPERATURE SENSING MEANS HAVING A RESISTANCE VALUE OF 1/7 THE RESISTANCE VALUE OF SAID RESISTANCE MEANS CONNECTED IN SERIES THEREWITH, MEANS CONNECTED IN PARALLEL WITH SAID TEMPERATURE SENSING MEANS AND SAID RESISTANCE MEANS FOR VARYING CURRENT IN RESPONSE TO THE TEMPERATURE SENSED BY SAID TEMPERATURE SENSING MEANS, AND AMPLIFIER MEANS CONNECTED TO SAID LAST MENTIONED MEANS FOR AMPLIFYING SAID CURRENT, SAID AMPLIFIER MEANS INCLUDING AT LEAST ONE SEMICONDUCTOR OF GERMANIUM MATERIAL HAVING ITS BASE AND EMITTER ELECTRODES BIASED TO PRECLUDE CONDUCTION BY LEAKAGE CURRENT AFTER A SELECTED CUT-OFF TEMPERATURE HAS BEEN REACHED, SAID AMPLIFIER MEANS PROVIDING LINEAR REPLACEMENT OF HEAT LOSSES FROM SAID ENCLOSURE.
Claim 2
Dependent Claim
136 words
A SOLID STATE NETWORK FOR CONTROLLING THE TEMPERATURE OF AN ENCLOSURE WITHIN LESS THAN ONE-TENTH DEGREE OF A SELECTED TEMPERATURE COMPRISING TEMPERATURE SENSING MEANS AND RESISTANCE MEANS CONNECTED IN SERIES THEREWITH, SAID TEMPERATURE SENSING MEANS HAVING A RESISTANCE VALUE OF 1/7 THE RESISTANCE VALUE OF SAID RESISTANCE MEANS CONNECTED IN SERIES THEREWITH, MEANS CONNECTED IN PARALLEL WITH SAID TEMPERATURE SENSING MEANS AND SAID RESISTANCE MEANS FOR VARYING CURRENT IN RESPONSE TO THE TEMPERATURE SENSED BY SAID TEMPERATURE SENSING MEANS, AND AMPLIFIER MEANS CONNECTED TO SAID LAST MENTIONED MEANS FOR AMPLIFYING SAID CURRENT, SAID AMPLIFIER MEANS INCLUDING AT LEAST ONE SEMICONDUCTOR OF GERMANIUM MATERIAL HAVING ITS BASE AND EMITTER ELECTRODES BIASED TO PRECLUDE CONDUCTION BY LEAKAGE CURRENT AFTER A SELECTED CUT-OFF TEMPERATURE HAS BEEN REACHED, SAID AMPLIFIER MEANS PROVIDING LINEAR REPLACEMENT OF HEAT LOSSES FROM SAID ENCLOSURE.
References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-05-15 | 1970-11-14 | 1971-05-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-15 | 1974-11-14 | 1975-05-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-15 | 1978-11-14 | 1979-05-16 | $7700.00 | Window Closed / Lapsed |