Patent US3145568A successfully refreshed from Google Patents.
US3145568A
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Solar radiation measuring device
Assignee: JOHN YELLOTT ENGINEERING ASSOC
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Filing: 1961-08-15
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Granted: 1964-08-25
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Expires: 1981-08-15
Abstract
No abstract record available.
Inventors
- 👤 John L Yellott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 13:26
CPC Classifications
G; G01; G01J; G01J5/00; G01J5/10; G01J5/20; G01J5/22; G01J5/24
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
91 words
AN ELECTRIC CIRCUIT FOR MEASURING SOLAR RADIATION INTENSITY COMPRISING A SINGLE, SILICON PHOTOVOLTAIC SEMICONDUCTOR CELL RESPONSIVE TO VARIATIONS IN INTENSITY OF SOLAR RADIATION, A LOW RESISTANCE ELEMENT HAVING A NEGATIVE TEMPERATURE COEFFICIENT CONNECTED ACROSS THE CELL TO COMPENSATE THE OUTPUT THEREOF FROM VARIATIONS DUE TO CHANGING TEMPERATURES OF THE CELL DURING OPERATION, SAID RESISTANCE ELEMENT HAVING A RESISTANCE VALUE ON THE ORDER OF A HALF AN OHM, MEANS TO CONNECT THE RESISTANCE ELEMENT TO SAID CELL IN THERMAL CONDUCTING RELATIONSHIP, AND A MILLIVOLTMETER CONNECTED ACROSS THE RESISTANCE ELEMENT, SO THAT THE
References Cited (Backward Citations)
US1546264A
Cited
US2098650A
Cited
US2547173A
Cited
US2846592A
Cited
US3001077A
Cited
US3024695A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-08-25 | 1968-02-24 | 1968-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-08-25 | 1972-02-24 | 1972-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-08-25 | 1976-02-24 | 1976-08-25 | $7700.00 | Window Closed / Lapsed |