US2626445A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Heavy-metal oxide resistors and process of making same
Assignee: Steatite Research Corp
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Filing: 1950-06-07
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Granted: 1953-01-27
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Expires: 1970-06-07
Abstract
No abstract record available.
Inventors
- 👤 Albers-Schoenberg Ernst
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:31
CPC Classifications
H; H01; H01C; H01C7/00; H01C7/04; H01C7/042; H01C7/043; H01C7/046; Y; Y10; Y10S; Y10S264/00; Y10S264/25
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
125 words
IN A METHOD OF MAKING HEAVY-METAL-OXIDE RESISTORS CONSISTING ESSENTIALLY OF A COMPOUND OF THE GENERAL FORMULA MO-M''2O3 IN WHICH M IS A BIVALENT FORM OF A METAL AND M'' IS A TRIVALENT FORM OF A METAL WHICH COMPRISES THE STEPS OF MIXING BIVALENT AND TRIVALENT METAL OXIDES IN SUBSTANTIALLY THE SAME PROPORTIONS AS INDICATED BY SAID FORMULA, MO.M''2O3, AND MATURING THE MIXTURE UNDER OXIDIZING FIRING CONDITIONS, THE IMPROVED PROCESS WHICH COMPRISES REHEATING THE FIRED PRODUCT AT A TEMPERATURE BELOW THE MATURING TEMPERATURE IN AN ATOMOSPHERE OF A NEUTRAL GAS AND COOLING THE PRODUCT IN A NEUTRAL ATMOSPHERE WHEREBY THE RESISTIVITY OF THE BODY IS DECREASED BY THE SAID REHEATING AND COOLING PROCESS TO A DEGREE DEPENDENT UPON THE TIME AND TEMPERATURE OF SAID HEATING PROCESS.
Claim 2
Dependent Claim
125 words
IN A METHOD OF MAKING HEAVY-METAL-OXIDE RESISTORS CONSISTING ESSENTIALLY OF A COMPOUND OF THE GENERAL FORMULA MO-M''2O3 IN WHICH M IS A BIVALENT FORM OF A METAL AND M'' IS A TRIVALENT FORM OF A METAL WHICH COMPRISES THE STEPS OF MIXING BIVALENT AND TRIVALENT METAL OXIDES IN SUBSTANTIALLY THE SAME PROPORTIONS AS INDICATED BY SAID FORMULA, MO.M''2O3, AND MATURING THE MIXTURE UNDER OXIDIZING FIRING CONDITIONS, THE IMPROVED PROCESS WHICH COMPRISES REHEATING THE FIRED PRODUCT AT A TEMPERATURE BELOW THE MATURING TEMPERATURE IN AN ATOMOSPHERE OF A NEUTRAL GAS AND COOLING THE PRODUCT IN A NEUTRAL ATMOSPHERE WHEREBY THE RESISTIVITY OF THE BODY IS DECREASED BY THE SAID REHEATING AND COOLING PROCESS TO A DEGREE DEPENDENT UPON THE TIME AND TEMPERATURE OF SAID HEATING PROCESS.
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) | 1956-01-27 | 1956-07-28 | 1957-01-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-01-27 | 1960-07-28 | 1961-01-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-01-27 | 1964-07-28 | 1965-01-27 | $7700.00 | Window Closed / Lapsed |