US3573210A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Electric insulating composition containing an organic semiconducting material
Assignee: Furukawa Electric Co Ltd
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Filing: 1967-12-05
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Granted: 1971-03-30
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Expires: 1987-12-05
Abstract
Abstract AN ELECTRICAL INSULATING SHAPED BODY, FREE FROM PARTIAL DISCHARGE AT INTERNAL VOIDS WHICH ARE INEVITABLY FORMED THEREIN. THE SHAPED BODY HAS A VOLUME RESISTIVITY LARGER THAN 10**10 OHM-CM., AND SURFACE RESISTIVITY SMALLER THAN 10**12 OHMS, BOTH AT THE OUTER SURFACE OF THE BODY AND THE INTERNAL SURFACE OF THE VOIDS. THE SURFACE RESISTIVITY IS ACHEIVED BY ADDING SPECIAL SEMICONDUCTING ORGANIC COMPOUNDS, WHICH BLEED ON THE SURFACE OF THE BODY BY AGING.
Inventors
- 👤 Hisatomo Furusawa
- 👤 Tadaaki Kuhara
- 👤 Hironori Matsuba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 09:51
CPC Classifications
H; H01; H01B; H01B3/00; H01B3/18; H01B3/30; H01B3/44; H01B3/441; H01B3/28; H01B3/443; H02; H02G; H02G15/00; H02G15/003; H02G15/08; H02G15/10; H02G15/103
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-03-29 | 1974-09-28 | 1975-03-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-03-29 | 1978-09-28 | 1979-03-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-03-29 | 1982-09-28 | 1983-03-30 | $7700.00 | Window Closed / Lapsed |