US3605494A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heat flow calorimeter
Assignee: Trane US Inc
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Filing: 1969-12-05
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Granted: 1971-09-20
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Expires: 1989-12-05
Abstract
Abstract COVERS A HEAT FLUX PROBE FOR MEASURING OR DETERMINING THE DISSIPATION OF HEAT TO AN EXTERNAL BODY OR SURFACE. THE PROBE INCLUDES TWO COAXIAL CYLINDRICAL CONDUCTIVE UNITS AND A NON-CONDUCTIVE HOUSING WHICH MAY ALSO BE COAXIAL WITH THE TWO UNITS, THE HOUSING EXPOSING ONE FACE OR SIDE OF THE INNERMOST UNIT TO THE EXTERNAL BODY OR SURFACE. BOTH UNITS HAVE PERPHERAL HEATING COILS WHICH RECEIVE CURRENTS TO MAINTAIN BOTH UNITS AT A COMMON TEMPERATURE. BOTH UNITS ARE SUPPORTED BY A COMMON NONCONDUCTIVE MEMBER.
Inventors
- 👤 Richard Carl Progelhof
- 👤 Norman Zethward Shilling
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 13:49
CPC Classifications
G; G01; G01K; G01K17/00
Claims Analysis
Total Claims: 0
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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) | 1974-09-19 | 1975-03-21 | 1975-09-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-09-19 | 1979-03-21 | 1979-09-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-09-19 | 1983-03-21 | 1983-09-20 | $7700.00 | Window Closed / Lapsed |