Patent US3131304A successfully refreshed from Google Patents.
US3131304A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Differential radiometer for sensing net rate of heat exchange
Assignee: Armstrong World Industries Inc
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Filing: 1961-03-24
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Granted: 1964-04-28
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Expires: 1981-03-24
Abstract
No abstract record available.
Inventors
- 👤 Jr Nathaniel E Hager
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:40
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A DIFFERENTIAL RADIOMETER COMPRISING IN COMBINATION A FIRST THERMOCOUPLE COMPRISING A FIRST PLATE CONNECTED TO A WIRE TO FORM A FIRST JUNCTION CAPABLE OF PRODUCING THERMOELECTRIC CURRENT, A SECOND THERMOCOUPLE COMPRISING A SECOND PLATE CONNECTED TO SAID WIRE TO FORM A SECOND JUNCTION CAPABLE OF PRODUCING THERMOELECTRIC CURRENT, AND LEAD WIRES CONNECTING EACH OF SAID PLATES TO A DEVICE CAPABLE OF SENSING DIFFERENCES IN POTENTIAL.
Claim 2
Dependent Claim
65 words
A DIFFERENTIAL RADIOMETER COMPRISING IN COMBINATION A FIRST THERMOCOUPLE COMPRISING A FIRST PLATE CONNECTED TO A WIRE TO FORM A FIRST JUNCTION CAPABLE OF PRODUCING THERMOELECTRIC CURRENT, A SECOND THERMOCOUPLE COMPRISING A SECOND PLATE CONNECTED TO SAID WIRE TO FORM A SECOND JUNCTION CAPABLE OF PRODUCING THERMOELECTRIC CURRENT, AND LEAD WIRES CONNECTING EACH OF SAID PLATES TO A DEVICE CAPABLE OF SENSING DIFFERENCES IN POTENTIAL.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-04-28 | 1967-10-28 | 1968-04-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-28 | 1971-10-28 | 1972-04-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-28 | 1975-10-28 | 1976-04-28 | $7700.00 | Window Closed / Lapsed |