US3555671A
Expired / Lapsed
US
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Layer thermistors and method for their manufacture
Assignee: Mersen SA
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Filing: 1967-06-19
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Granted: 1971-01-19
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Expires: 1987-06-19
Abstract
Abstract A METHOD OF MANUFACTURING A LAYER THERMISTOR WHICH PERMITS PRECISE DETERMINATION OF ITS OHMIC VALUE COMPRISING THE STEPS OF COATING A REFRACTORY SUBSTRATE WITH A THIN SEMI-CONDUCTIVE LAYER HAVING A HIGH TEMPERATURE COEFFICIENT, BAKING SAID LAYER, MEASURING THE OHMIC VALUE OF SAID LAYER, AND ADJUSTING SAID OHMIC VALUE TO A PREDETERMINED VALUE BY CUTTING A THREAD INTO SAID LAYER WHILE MAINTAINING THE TEMPERATURE OF SAID LAYER SUBSTANTIALLY CONSTANT.
Inventors
- 👤 John Aizicovici
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:13
CPC Classifications
H; H01; H01C; H01C17/00; H01C17/22; H01C17/232; H01C7/00; H01C7/02; H01C7/021; H01C7/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49085; Y10T29/49099
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-01-18 | 1974-07-20 | 1975-01-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-01-18 | 1978-07-20 | 1979-01-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-01-18 | 1982-07-20 | 1983-01-19 | $7700.00 | Window Closed / Lapsed |