Patent US2261852A successfully refreshed from Google Patents.
US3299709A
Expired / Lapsed
US
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Resistance thermometer system
Assignee: Consolidated Controls Corp
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Filing: 1963-08-27
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Granted: 1967-01-24
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Expires: 1983-08-27
Abstract
No abstract record available.
Inventors
- 👤 George A O'sullivan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 23:46
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/16; G01K7/18; G01K7/20
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
94 words
A RESISTANCE THERMOMETER SYSTEM COMPRISING A FIRST RESISTANCE ELEMENT HAVING A RESISTIVITY WHICH VARIES WITH TEMPERATURE OVER A PREDETERMINED RANGE, A SECOND RESISTANCE ELEMENT HAVING THE SAME RESISTANCE AS SAID FIRST ELEMENT AT A PREDETERMINED TEMPERATURE AND HAVING A SUBSTANTIALLY ZERO TEMPERATURE COEFFICIENT OF RESISTIVITY, A VARIABLE VOLTAGE SOURCE, A FIXED VOLTAGE SOURCE, MEANS CONNECTING SAID FIRST AND SECOND RESISTANCE ELEMENTS IN SERIES ACROSS SAID VARIABLE VOLTAGE SOURCE, THIRD AND FOURTH RESISTANCE ELEMENTS CONNECTED ACROSS SAID FIXED VOLTAGE SOURCE AND EACH HAVING A SUBSTANTIALLY ZERO TEMPERATURE COEFFICIENT OF RESISTIVITY, MEANS FOR COMPARING THE VOLTAGE
References Cited (Backward Citations)
US3163042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1970-01-23 | 1970-07-25 | 1971-01-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-01-23 | 1974-07-25 | 1975-01-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-01-23 | 1978-07-25 | 1979-01-24 | $7700.00 | Window Closed / Lapsed |