US3121035A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High temperature electric insulator
Assignee: US Philips Corp
•
Filing: 1960-07-05
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Granted: 1964-02-11
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Expires: 1980-07-05
Abstract
No abstract record available.
Inventors
- 👤 Heinze Karl Alexander Otto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 15:54
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/02; H01B3/025; H01B1/00; H01B1/06; H01B1/08; H01J; H01J1/00; H01J1/02; H01J1/13; H01J1/20; H01J1/24
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
47 words
AN INSULATOR HAVING A PREFERRED ELECRONIC CONDUCTIVITY AT HIGH TEMPERATURES CONSISTING ESSENTIALLY OF A PLURALITY OF ADJOINING LAYERS OF INSULATING MATERIALS WHICH BECOME SEMI-CONDUCTIVE AT HIGHER TEMPERATURES, ALTERNATE LAYERS BEING OF N-CONDUCTIVE AL2O3 SEPARATED BY A P-CONDUCTIVE LAYER WHEREBY SUCCESSIVELY ADJOINING LAYERS FORM JUNCTIONS OF OPPOSITE CONDUCTIVITIES.
Claim 2
Dependent Claim
47 words
AN INSULATOR HAVING A PREFERRED ELECRONIC CONDUCTIVITY AT HIGH TEMPERATURES CONSISTING ESSENTIALLY OF A PLURALITY OF ADJOINING LAYERS OF INSULATING MATERIALS WHICH BECOME SEMI-CONDUCTIVE AT HIGHER TEMPERATURES, ALTERNATE LAYERS BEING OF N-CONDUCTIVE AL2O3 SEPARATED BY A P-CONDUCTIVE LAYER WHEREBY SUCCESSIVELY ADJOINING LAYERS FORM JUNCTIONS OF OPPOSITE CONDUCTIVITIES.
References Cited (Backward Citations)
US2089817A
Cited
US2795742A
Cited
US2914665A
Cited
US2836776A
Cited
US2959504A
Cited
US3082126A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |