US2664486A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Thermistor and method of heat-treating it
Assignee: Nortel Networks Ltd
•
Filing: 1951-06-15
•
Granted: 1953-12-29
•
Expires: 1971-06-15
Abstract
No abstract record available.
Inventors
- 👤 Harry C Colpitts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 06:50
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49087; Y10T29/49098
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
51 words
A METHOD OF MAKING URANIUM OXIDE THERMISTORS WITH A TEMPERATURE-RESISTANCE CHARACTERISTIC OF HIGH ACCURACY WHICH COMPRISES A PREFORMING OF THE SEMICONDUCTOR ELEMENT AND THEREAFTER HEAT TREATING BY THE MOMENTARY DISSIPATION OF ELECTRIC ENERGY IN THE SAID ELEMENT, SAID ENERGY BEING VERY LARGE COMPARED TO THE NORMAL WORKING CAPACITY OF THE THERMISTOR.
Claim 2
Independent Claim
51 words
A METHOD OF MAKING URANIUM OXIDE THERMISTORS WITH A TEMPERATURE-RESISTANCE CHARACTERISTIC OF HIGH ACCURACY WHICH COMPRISES A PREFORMING OF THE SEMICONDUCTOR ELEMENT AND THEREAFTER HEAT TREATING BY THE MOMENTARY DISSIPATION OF ELECTRIC ENERGY IN THE SAID ELEMENT, SAID ENERGY BEING VERY LARGE COMPARED TO THE NORMAL WORKING CAPACITY OF THE THERMISTOR.
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) | 1956-12-28 | 1957-06-29 | 1957-12-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-12-28 | 1961-06-29 | 1961-12-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-12-28 | 1965-06-29 | 1965-12-29 | $7700.00 | Window Closed / Lapsed |