US3129588A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indicating device
Assignee: Individual
•
Filing: 1961-09-07
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Granted: 1964-04-21
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Expires: 1981-09-07
Abstract
No abstract record available.
Inventors
- 👤 John R Martin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 09:01
CPC Classifications
G; G01; G01K; G01K7/00; G01K7/36
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
118 words
A TEMPERATURE INDICATING DEVICE COMPRISING, IN ELECTRICAL SERIES CIRCUIT RELATIONSHIP, AN ELECTRICAL COIL, A SOURCE OF ELECTRICAL CURRENT, A VARIABLE RESISTOR ADJUSTABLE TO PRESET SAID CIRCUIT TO A PREDETERMINED INITIAL FLOW OF CURRENT THROUGH SAID COIL, AND A THERMISTOR ADAPTED TO BE EXPOSED TO UNKNOWN TEMPERATURES SO THAT THE CURRENT SUPPLIED TO SAID COIL IS CONTROLLED BY SAID THERMISTOR AND CORRESPONDS TO SAID UNKNOWN TEMPERATURES; A MAGNETOSTRICTIVE MATERIAL POSITIONED IN THE FIELD OF SAID COIL; A SEALED ENCLOSURE FOR SAID MAGNETOSTRICTIVE MATERIAL INCLUDING A FIRST PORTION CONTAINING SAID MAGNETOSTRICTIVE MATERIAL AND A SECOND PORTION OF REDUCED CROSS SECTIONAL AREA; AND A LIQUID FILLING SAID FIRST PORTION OF SAID ENCLOSURE AND EXTENDING INTO SAID SECOND PORTION OF SAID ENCLOSURE.
Claim 2
Dependent Claim
118 words
A TEMPERATURE INDICATING DEVICE COMPRISING, IN ELECTRICAL SERIES CIRCUIT RELATIONSHIP, AN ELECTRICAL COIL, A SOURCE OF ELECTRICAL CURRENT, A VARIABLE RESISTOR ADJUSTABLE TO PRESET SAID CIRCUIT TO A PREDETERMINED INITIAL FLOW OF CURRENT THROUGH SAID COIL, AND A THERMISTOR ADAPTED TO BE EXPOSED TO UNKNOWN TEMPERATURES SO THAT THE CURRENT SUPPLIED TO SAID COIL IS CONTROLLED BY SAID THERMISTOR AND CORRESPONDS TO SAID UNKNOWN TEMPERATURES; A MAGNETOSTRICTIVE MATERIAL POSITIONED IN THE FIELD OF SAID COIL; A SEALED ENCLOSURE FOR SAID MAGNETOSTRICTIVE MATERIAL INCLUDING A FIRST PORTION CONTAINING SAID MAGNETOSTRICTIVE MATERIAL AND A SECOND PORTION OF REDUCED CROSS SECTIONAL AREA; AND A LIQUID FILLING SAID FIRST PORTION OF SAID ENCLOSURE AND EXTENDING INTO SAID SECOND PORTION OF SAID ENCLOSURE.
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) | 1967-04-21 | 1967-10-21 | 1968-04-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-04-21 | 1971-10-21 | 1972-04-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-04-21 | 1975-10-21 | 1976-04-21 | $7700.00 | Window Closed / Lapsed |