US4565901A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Gas-insulated electric device
Assignee: Mitsubishi Electric Corp
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Filing: 1984-06-08
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Granted: 1986-01-21
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Expires: 2004-06-08
Abstract
Abstract A gas-insulated electric device comprising an electric conductor disposed in a sealed vessel filled with an insulating gas, the conductor being supported by a solid insulating member. The insulating gas is a nitrilic fluorocarbon compound or a mixture of a nitrilic fluorocarbon compound and SF6. In this device, the dielectric strength is increased. Accordingly, the size of the device can be decreased.
Inventors
- 👤 Koichi Hirooka
- 👤 Setsuyuki Matsuda
- 👤 Yoshikuni Arahata
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 15:58
CPC Classifications
H; H02; H02B; H02B13/00; H02B13/02; H02B13/035; H02B13/055; H01; H01B; H01B3/00; H01B3/02; H01B3/16; H01B3/18; H01B3/56; H01H; H01H33/00; H01H33/02; H01H33/04; H01H33/22
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
52 words
A gas-insulated electric device comprising an electric conductor disposed in a sealed vessel filled with an insulating gas, said conductor being supported by a solid insulating member, wherein the insulating gas is a mixture comprising 10-60 mole % of C 2 F 5 CN and 40-90 mole % of SF 6 .
Claim 2
Dependent Claim
52 words
A gas-insulated electric device comprising an electric conductor disposed in a sealed vessel filled with an insulating gas, said conductor being supported by a solid insulating member, wherein the insulating gas is a mixture comprising 10-60 mole % of C 2 F 5 CN and 40-90 mole % of SF 6 .
References Cited (Backward Citations)
US3048648A
Cited
US4257905A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-01-20 | 1989-07-22 | 1990-01-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-01-20 | 1993-07-22 | 1994-01-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-01-20 | 1997-07-22 | 1998-01-21 | $7700.00 | Window Closed / Lapsed |