US3393448A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for making thermistors
Assignee: OI Glass Inc
•
Filing: 1965-12-22
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Granted: 1968-07-23
•
Expires: 1985-12-22
Abstract
No abstract record available.
Inventors
- 👤 Paul J Harget
- 👤 Dennis T Sturgill
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:39
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; H01C7/045; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49082; Y10T29/49085
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
92 words
A METHOD OF MAKING A THERMISTOR DEVICE CAPABLE OF STABLE OPERATION AT ELEVATED TEMPERATURE WHICH COMPRISES OXIDIZING A MATERIAL CONTAINING TI02 AND FE0. TI02, HEATING THE OXIDIZED MATERIAL TO A TEMPERATURE ABOVE THE MELTING POINT OF SAID OXIDIZED MATERIAL, SHAPING THE MOLTEN MATERIAL INTO A DESIRED CONFIGURATION, PLACING IT ON AT LEAST ONE METAL LEAD, COOLING SAID MOLTEN MATERIAL TO FORM A SOLID FERRIC TITANATE-RUTILE COMPOUND AND THEREAFTER HEATING THE DEVICE TO A TEMPERATURE OF AT LEAST ABOUT 200* C. FOR A SUFFICIENT PERIOD OF TIME TO OBTAIN THE DESIRED RESISTIVITY CHARACTERISTICS.
Claim 2
Independent Claim
92 words
A METHOD OF MAKING A THERMISTOR DEVICE CAPABLE OF STABLE OPERATION AT ELEVATED TEMPERATURE WHICH COMPRISES OXIDIZING A MATERIAL CONTAINING TI02 AND FE0. TI02, HEATING THE OXIDIZED MATERIAL TO A TEMPERATURE ABOVE THE MELTING POINT OF SAID OXIDIZED MATERIAL, SHAPING THE MOLTEN MATERIAL INTO A DESIRED CONFIGURATION, PLACING IT ON AT LEAST ONE METAL LEAD, COOLING SAID MOLTEN MATERIAL TO FORM A SOLID FERRIC TITANATE-RUTILE COMPOUND AND THEREAFTER HEATING THE DEVICE TO A TEMPERATURE OF AT LEAST ABOUT 200* C. FOR A SUFFICIENT PERIOD OF TIME TO OBTAIN THE DESIRED RESISTIVITY CHARACTERISTICS.
References Cited (Backward Citations)
US2371660A
Cited
US2462162A
Cited
US2616859A
Cited
US2735824A
Cited
US2590894A
Cited
US2797175A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1971-07-23 | 1972-01-22 | 1972-07-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1975-07-23 | 1976-01-22 | 1976-07-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1979-07-23 | 1980-01-22 | 1980-07-23 | $7700.00 | Window Closed / Lapsed |