Patent US3109227A successfully refreshed from Google Patents.
US3109227A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Uniform thermistor manufacture
Assignee: FENWAL ELECTRONICS Inc
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Filing: 1962-11-05
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Granted: 1963-11-05
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Expires: 1982-11-05
Abstract
No abstract record available.
Inventors
- 👤 Robert S Goodyear
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:42
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
140 words
IN THE MANUFACTURE OF THERMISTORS, THE METHOD WHICH COMPRISES THE STEPS OF (A) PREPARING BATCH QUANTITIES OF FINELY DIVIDED SEMICONDUCTOR MATERIAL FOR FABRICATING AS SIMILAR THERMISTORS, (B) SUBJECTING THE MATERIAL TO SINTERING HEAT AND THEREBY AGGLOMERATING IT TO FORM BODIES FOR THE TERMISTORS, (C) APPLYING ELECTRICALLY CONDUCTIVE MATERIALS TO SAID BODIES TO CONSTITUTE THEM AS THERMISTOR ELEMENTS, (D) ASSEMBLING SAID ELEMENTS IN PLURALITIES WHOSE COMPOSITE RESISTANCE HAS A FIRST PREDETERMINED VALUE WITHIN A SELECTED TOLERANCE AT ONE POINT IN AN ELECTED TEMPERATURE RANGE, AND (E) UTILIZING FROM SAID ASSEMBLED ELEMENT PLURALITIES THOSE PLUALITIES WHOSE COMPOSITE RESISTANCE HAS A SECOND PREDETERMINED VALUE WITHIN A SELECTED TOLERANCE AT ANOTHER SPACED POINT IN SAID ELECTED TEMPERATURE RANGE BY THEN CONNECTING THOSE LATTER PLURALITIES TOGETHER TO FORM COMPOSITE THERMISTOR UNITS WHOSE RESISTANCE-TEMPERATURE CURVES ARE IDENTICAL WITHIN THE SELECTED TOLERANCE THROUGHOUT SAID ELECTED TEMPERATURE RANGE.
Claim 2
Dependent Claim
140 words
IN THE MANUFACTURE OF THERMISTORS, THE METHOD WHICH COMPRISES THE STEPS OF (A) PREPARING BATCH QUANTITIES OF FINELY DIVIDED SEMICONDUCTOR MATERIAL FOR FABRICATING AS SIMILAR THERMISTORS, (B) SUBJECTING THE MATERIAL TO SINTERING HEAT AND THEREBY AGGLOMERATING IT TO FORM BODIES FOR THE TERMISTORS, (C) APPLYING ELECTRICALLY CONDUCTIVE MATERIALS TO SAID BODIES TO CONSTITUTE THEM AS THERMISTOR ELEMENTS, (D) ASSEMBLING SAID ELEMENTS IN PLURALITIES WHOSE COMPOSITE RESISTANCE HAS A FIRST PREDETERMINED VALUE WITHIN A SELECTED TOLERANCE AT ONE POINT IN AN ELECTED TEMPERATURE RANGE, AND (E) UTILIZING FROM SAID ASSEMBLED ELEMENT PLURALITIES THOSE PLUALITIES WHOSE COMPOSITE RESISTANCE HAS A SECOND PREDETERMINED VALUE WITHIN A SELECTED TOLERANCE AT ANOTHER SPACED POINT IN SAID ELECTED TEMPERATURE RANGE BY THEN CONNECTING THOSE LATTER PLURALITIES TOGETHER TO FORM COMPOSITE THERMISTOR UNITS WHOSE RESISTANCE-TEMPERATURE CURVES ARE IDENTICAL WITHIN THE SELECTED TOLERANCE THROUGHOUT SAID ELECTED TEMPERATURE RANGE.
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) | 1966-11-04 | 1967-05-06 | 1967-11-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-11-04 | 1971-05-06 | 1971-11-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-11-04 | 1975-05-06 | 1975-11-05 | $7700.00 | Window Closed / Lapsed |