Patent US3251218A successfully refreshed from Google Patents.
Patent US3033907A successfully refreshed from Google Patents.
US3033907A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Substitution type tio2 semi-conductors
Assignee: Erie Resistor Corp
•
Filing: 1957-05-20
•
Granted: 1962-05-08
•
Expires: 1977-05-20
Abstract
No abstract record available.
Inventors
- 👤 Charles V Rue
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 18:10
CPC Classifications
H; H01; H01B; H01B1/00; H01B1/06; H01B1/08; H10; H10N; H10N10/00; H10N10/80; H10N10/85; H10N10/851; H10N10/855
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
120 words
A HIGH TEMPERATURE FIRED SEMI-CONDUCTOR CERAMIC BODY CONSISTING ESSENTIALLY OF A HOST LATTICE OF TIO2 INTO WHICH IS INTRODUCED A PERCENTAGE OF PENTAVALENT IONS SELECTED FROM THE GROUP CONSISTING OF NB, TA, SB IN A MOL PERCENTAGE RANGE FROM .25 TO 5% OF THE TIO2, SAID BODY BEING FIRED AT ABOUT 1200*-1500* C. AND QUENCHED FROM A TEMPERATURE IN THE REGION OF ITS FIRING TEMPERATURE AND CHARACTERIZED BY A REDUCTION IN RESISTANCE OF SEVERAL DECADES IN MAGNITUDE AS COMPARED TO UNQUENCHED BODIES OF THE SAME COMPOSITION AND BEING FURTHER CHARACTERIZED BY A THERMO-ELECTRIC FORCE WHICH IS RELATIVELY SLIGHTLY DECREASED AS COMPARED TO SAID DECREASE IN RESISTANCE SO THAT THE THERMOELECTRIC POWER OUTPUT OBTAINED IS MUCH GREATTER FOR THE QUENCHED BODIES.
Claim 2
Dependent Claim
120 words
A HIGH TEMPERATURE FIRED SEMI-CONDUCTOR CERAMIC BODY CONSISTING ESSENTIALLY OF A HOST LATTICE OF TIO2 INTO WHICH IS INTRODUCED A PERCENTAGE OF PENTAVALENT IONS SELECTED FROM THE GROUP CONSISTING OF NB, TA, SB IN A MOL PERCENTAGE RANGE FROM .25 TO 5% OF THE TIO2, SAID BODY BEING FIRED AT ABOUT 1200*-1500* C. AND QUENCHED FROM A TEMPERATURE IN THE REGION OF ITS FIRING TEMPERATURE AND CHARACTERIZED BY A REDUCTION IN RESISTANCE OF SEVERAL DECADES IN MAGNITUDE AS COMPARED TO UNQUENCHED BODIES OF THE SAME COMPOSITION AND BEING FURTHER CHARACTERIZED BY A THERMO-ELECTRIC FORCE WHICH IS RELATIVELY SLIGHTLY DECREASED AS COMPARED TO SAID DECREASE IN RESISTANCE SO THAT THE THERMOELECTRIC POWER OUTPUT OBTAINED IS MUCH GREATTER FOR THE QUENCHED BODIES.
References Cited (Backward Citations)
US2272330A
Cited
US2311918A
Cited
US2331444A
Cited
US2563307A
Cited
US2530255A
Cited
US2511216A
Cited
US2588508A
Cited
US2692212A
Cited
US2675417A
Cited
US2748250A
Cited
US2886682A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-05-07 | 1965-11-06 | 1966-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-05-07 | 1969-11-06 | 1970-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-05-07 | 1973-11-06 | 1974-05-08 | $7700.00 | Window Closed / Lapsed |