Patent US3249681A successfully refreshed from Google Patents.
US3249681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Self-extinguishment of corona discharge in electrical apparatus
Assignee: EIDP Inc
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Filing: 1963-05-15
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Granted: 1966-05-03
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Expires: 1983-05-15
Abstract
No abstract record available.
Inventors
- 👤 Jr Bernhardt J Eiseman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 14:27
CPC Classifications
H; H01; H01T; H01T19/00; H01T19/02; H01J; H01J17/00; H01J61/00; H01J61/02; H01J61/12; H01J61/14; H01J2893/00; H01J2893/0059
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
95 words
A GAS-TIGHT ELECTRICAL APPARATUS CONTAINING AT LEAST ONE ELECTRICAL CONDUCTOR FROM WHICH CORONA-TYPE DISCHARGE MAY OCCUR, A GASEOUS DIELECTRIC SURROUNDING SAID CONDUCTOR; SAID GASEOUS DIELECTRIC COMPRISING AS A CORONA SELF-SUPPRESSING AGENT A GASEOUS INORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS PENTAFLUORIDE BIS-PENTAFLUOROSULFUR OXIDE, AMMONIA, HYDROGEN SULFIDE, SULFUR CHLORO-PENTAFLUORIDE, HYDROGEN CHLORIDE, HYDROGEN BROMIDE, HYDROGEN IODIDE, AND CARBON MONOXIDE, SAID CORONA SELF-SUPPRESSING AGENT HAVING A PARTIAL PRESSURE OF AT LEAST 50 MM. OF MERCURY IN SAID GASEOUS DIELECTRIC, AND SAID CORONA SELF-SUPPRESSING AGENT BEING CAPABLE OF PRODUCING A SOLID DEPOSIT OF A MATERIAL OF A
Claim 2
Dependent Claim
95 words
A GAS-TIGHT ELECTRICAL APPARATUS CONTAINING AT LEAST ONE ELECTRICAL CONDUCTOR FROM WHICH CORONA-TYPE DISCHARGE MAY OCCUR, A GASEOUS DIELECTRIC SURROUNDING SAID CONDUCTOR; SAID GASEOUS DIELECTRIC COMPRISING AS A CORONA SELF-SUPPRESSING AGENT A GASEOUS INORGANIC COMPOUND SELECTED FROM THE GROUP CONSISTING OF PHOSPHORUS PENTAFLUORIDE BIS-PENTAFLUOROSULFUR OXIDE, AMMONIA, HYDROGEN SULFIDE, SULFUR CHLORO-PENTAFLUORIDE, HYDROGEN CHLORIDE, HYDROGEN BROMIDE, HYDROGEN IODIDE, AND CARBON MONOXIDE, SAID CORONA SELF-SUPPRESSING AGENT HAVING A PARTIAL PRESSURE OF AT LEAST 50 MM. OF MERCURY IN SAID GASEOUS DIELECTRIC, AND SAID CORONA SELF-SUPPRESSING AGENT BEING CAPABLE OF PRODUCING A SOLID DEPOSIT OF A MATERIAL OF A
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |