US3611786A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Measurement of thermal conductivity of hard crystalline bodies
Assignee: AT&T Inc
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Filing: 1969-05-23
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Granted: 1971-10-12
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Expires: 1989-05-23
Abstract
Abstract DETERMINATION OF THE THERMAL CONDUCTIVITY OF AN IRREGULARLY-SHAPED BODY OF DIAMOND OR OTHER HARD CRYSTALLINE MATERIAL IS MADE BY APPLYING HEAT TO THE BODY AT A KNOWN INPUT RATE FROM A THERMAL PROBE THROUGH A LOW RESISTANCE THERMAL CONTACT OF KNOWN, RELATIVELY SMALL AREA ON THE BODY. THE THERMAL CONDUCTIVITY IS A FUNCTION OF THE TEMPERATURE DROP AS OBSERVED THROUGH A FINITE PORTION OF THE BODY, THE HEAT INPUT RATE AND THE RADIUS OF THE HEAT INPUT AREA.
Inventors
- 👤 Anthony J Schorr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:40
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/18
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) | 1974-10-11 | 1975-04-12 | 1975-10-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-11 | 1979-04-12 | 1979-10-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-11 | 1983-04-12 | 1983-10-12 | $7700.00 | Window Closed / Lapsed |