US3217537A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for determining specific heat
Assignee: Armstrong World Industries Inc
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Filing: 1963-02-25
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Granted: 1965-11-16
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Expires: 1983-02-25
Abstract
No abstract record available.
Inventors
- 👤 Jr Nathaniel E Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 07:30
CPC Classifications
G; G01; G01N; G01N25/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
141 words
THE METHOD OF DETERMINING THE SPECIFIC HEAT OF A MATERIAL IN THE FORM OF A THIN LAYER WHICH COMPRISES PLACING AT LEAST ONE UNIFORM LAYER HAVING A KNOWN WEIGHT PER UNIT AREA OF THE MATERIAL TO BE TESTED HAVING A THICKNESS NO GREATER THAN ABOUT 50 MILS ON AT LEAST ONE FLEXIBLE THIN METALLIC FOIL RESISTANCE HEATER OF THICKNESS LESS THAN ABOUT 0.01 INCH OF KNOWN SPECIFIC HEAT, DENSITY, AND THICKNESS, ARRANGING A MULTIPLE ARRAY OF SAID LAYERS AND SAID HEATERS WHEREIN SAID LAYER AND SAID HEATER ARE IN PHYSICAL CONTACT THROUGHOUT THEIR OPPOSING SURFACES, PASSING ELECTRICAL CURRENT AT A KNOWN RATE THROUGH SAID HEATER TO RAISE THE TEMPERATURE OF SAID ARRAY, MEASURING THE RATE OF TEMPERATURE RISE IN THE INTERIOR OF SAID ARRAY AND DETERMINING THE SPECIFIC HEAT, C, OF THE MATERIAL IN SAID LAYER BY MEANS OF THE RELATIONSHIP
Claim 2
Independent Claim
141 words
THE METHOD OF DETERMINING THE SPECIFIC HEAT OF A MATERIAL IN THE FORM OF A THIN LAYER WHICH COMPRISES PLACING AT LEAST ONE UNIFORM LAYER HAVING A KNOWN WEIGHT PER UNIT AREA OF THE MATERIAL TO BE TESTED HAVING A THICKNESS NO GREATER THAN ABOUT 50 MILS ON AT LEAST ONE FLEXIBLE THIN METALLIC FOIL RESISTANCE HEATER OF THICKNESS LESS THAN ABOUT 0.01 INCH OF KNOWN SPECIFIC HEAT, DENSITY, AND THICKNESS, ARRANGING A MULTIPLE ARRAY OF SAID LAYERS AND SAID HEATERS WHEREIN SAID LAYER AND SAID HEATER ARE IN PHYSICAL CONTACT THROUGHOUT THEIR OPPOSING SURFACES, PASSING ELECTRICAL CURRENT AT A KNOWN RATE THROUGH SAID HEATER TO RAISE THE TEMPERATURE OF SAID ARRAY, MEASURING THE RATE OF TEMPERATURE RISE IN THE INTERIOR OF SAID ARRAY AND DETERMINING THE SPECIFIC HEAT, C, OF THE MATERIAL IN SAID LAYER BY MEANS OF THE RELATIONSHIP
References Cited (Backward Citations)
US3045473A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1968-11-15 | 1969-05-17 | 1969-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1972-11-15 | 1973-05-17 | 1973-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1976-11-15 | 1977-05-17 | 1977-11-16 | $7700.00 | Window Closed / Lapsed |