Patent US2245392A successfully refreshed from Google Patents.
Patent US3701683A successfully refreshed from Google Patents.
US3701683A
Expired / Lapsed
US
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Manufacture of high voltage insulated electric cables
Assignee: Balfour Beatty PLC
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Filing: 1971-01-13
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Granted: 1972-10-31
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Expires: 1991-01-13
Abstract
Abstract IRRADIATION WITH HIGH ENERGY ELECTRONS IS PREFERRED. IN THE MANUFACTURE OF A HIGH VOLTAGE ELECTRIC CONDUCTOR BY APPLYING TO A METALLIC CONDUCTOR AN INSULATING COVERING OF AN ETHYLENE POLYMER AT LEAST 2.5 MM. THICK AND SUBJECTING THE COVERING TO HIGH ENERGY RADIATION, THE INSULATING COVERING IS CAUSED TO ABSORB A DOSE D MRAD IN THE RANGE 20-60 MRAD (PREFERABLY 25-55 MRAD) AT AN AVERAGE RATE R MRAD/SEC. SUCH THAT D R A W I N G
Inventors
- 👤 Graham Boyce Wills
- 👤 Frank Stanley Walker
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 10:11
CPC Classifications
B; B29; B29C; B29C71/00; B29C71/04; B29C48/00; B29C48/03; B29C48/06; B29C48/25; B29C48/88; B29C48/91; H; H01; H01B; H01B13/00; H01B13/003; B29C35/00; B29C35/02; B29C35/08; B29C35/0866; B29C2035/0877; B29C48/05; B29K; B29K2023/00; B29K2023/04; B29K2023/06; B29L; B29L2031/00; B29L2031/34; B29L2031/3462
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) | 1975-10-31 | 1976-05-01 | 1976-10-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-10-31 | 1980-05-01 | 1980-10-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-10-31 | 1984-05-01 | 1984-10-31 | $7700.00 | Window Closed / Lapsed |