US3279239A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for measurement of thermal conductivity
Assignee: Dow Chemical Co
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Filing: 1964-04-29
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Granted: 1966-10-18
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Expires: 1984-04-29
Abstract
No abstract record available.
Inventors
- 👤 Charles B Arends
- 👤 Daniel H Haigh
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 20:40
CPC Classifications
G; G01; G01N; G01N25/00; G01N25/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
115 words
A METHOD FOR DETERMINING THE THERMAL CONDUCTIVITY OF A SOLID FILM OR SHEET; THE STEPS OF THE METHDO COMPRISING; POSITIONING BETWEEN A HEAT SOURCE AND A HEAT SINK A SOLID FILM OR SHEET TO BE TESTED; MAINTAINING THE FILM IN THERMAL CONTACT WITH THE HEAT SOURCE AND THE HEAT SINK; CONTINUOUSLY CHANGEING THE TEMPERATURE OF THE HEAT SOURCE; MEASURING THE TEMPERATURE OF THE SINK AS A FUNCTION OF TIME; SIMULTAINEOUSLY MEASURING THE TEMPERATURE DIFFERENTIAL BETWEEN THE SOURCE AND THE SINK AS THE TEMPERATURE OF THE HEAT SOURCE IS CHANGED; MAINTAINING THE HEAT SOURCE, THE HEAT SINK AND THE FILM TO BE MEASURED UNDER AN ABSOLUTE PRESSURE OF UP TO ABOUT 0.1 MM. OF MERCURY; AND
Claim 2
Independent Claim
115 words
A METHOD FOR DETERMINING THE THERMAL CONDUCTIVITY OF A SOLID FILM OR SHEET; THE STEPS OF THE METHDO COMPRISING; POSITIONING BETWEEN A HEAT SOURCE AND A HEAT SINK A SOLID FILM OR SHEET TO BE TESTED; MAINTAINING THE FILM IN THERMAL CONTACT WITH THE HEAT SOURCE AND THE HEAT SINK; CONTINUOUSLY CHANGEING THE TEMPERATURE OF THE HEAT SOURCE; MEASURING THE TEMPERATURE OF THE SINK AS A FUNCTION OF TIME; SIMULTAINEOUSLY MEASURING THE TEMPERATURE DIFFERENTIAL BETWEEN THE SOURCE AND THE SINK AS THE TEMPERATURE OF THE HEAT SOURCE IS CHANGED; MAINTAINING THE HEAT SOURCE, THE HEAT SINK AND THE FILM TO BE MEASURED UNDER AN ABSOLUTE PRESSURE OF UP TO ABOUT 0.1 MM. OF MERCURY; AND
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-10-17 | 1970-04-18 | 1970-10-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-10-17 | 1974-04-18 | 1974-10-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-10-17 | 1978-04-18 | 1978-10-18 | $7700.00 | Window Closed / Lapsed |