US3225820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Device for controlling temperature by heat conduction
Assignee: General Precision Inc
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Filing: 1962-11-01
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Granted: 1965-12-28
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Expires: 1982-11-01
Abstract
No abstract record available.
Inventors
- 👤 Hugh E Riordan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 17:05
CPC Classifications
F; F25; F25D; F25D19/00; F25D19/006; F28; F28F; F28F13/00; G; G05; G05D; G05D23/00; G05D23/01; G05D23/19; G05D23/1919; G05D23/192; F28F2013/005; F28F2013/008
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
96 words
A TEMPERATURE CONTROL SYSTEM COMPRISING: A CONTROLLED BODY; HEATER MEANS OPERABLE TO SUPPLY HEAT TO SAID BODY; A HEAT SINK OF UNCONTROLLED TEMPERATURE NORMALLY LOWER THAN THAT OF SAID BODY; A VARIABLE THERMAL RESISTANT DEVICE, INVERSELY RESPONSIVE TO THE TEMPERATURE OF SAID SINK, INTERPOSED IN THERMALLY CONDUCTIVE RELATION BETWEEN SAID BODY AND HEAT SINK; SAID VARIABLE RESISTANCE DEVICE INCLUDING A TEMPERATURE RESPONSIVE MEMBER IN A CONTINUOUS HEAT CONDUCTIVE RELATION WITH SAID HEAT SINK; AND SWITCHING MEANS EFFECTIVE UPON THE ATTAINMENT OF A CONDITION OF MAXIMUM THERMAL RESISTANCE BY SAID DEVICE TO RENDER OPERATIVE SAID HEATER MEANS.
References Cited (Backward Citations)
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Cited
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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) | 1968-12-27 | 1969-06-28 | 1969-12-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-12-27 | 1973-06-28 | 1973-12-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-12-27 | 1977-06-28 | 1977-12-28 | $7700.00 | Window Closed / Lapsed |