Patent US3138682A successfully refreshed from Google Patents.
US3138682A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage arc extinguishing electric fuses
Assignee: E M P Electric Ltd
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Filing: 1960-11-23
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Granted: 1964-06-23
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Expires: 1980-11-23
Abstract
No abstract record available.
Inventors
- 👤 Dannenberg Kurt
- 👤 Hicks Bruce Clifford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 08:53
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/05; H01H85/055
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
84 words
A HIGH VOLTAGE ELECTRIC FUSE COMPRISING AN OUTER CASING, AN ARC EXTINGUISHING POWER FILLING IN SAID CASING, TERMINAL CAPS ON SAID CASING AND A FUSIBLE ELEMENT EMBEDDED WITHIN THE ARC EXTINGUISHING POWDER INSAID CASING EXTENDING FROM ONE END CAP TO THE OTHER, SAID FUSIBLE ELEMENT INCLUDING SEVERAL SECTIONS OF UNIFORM CROSS-SEC TIONAL AREA, A CERAMIC ELEMENT SURROUNDING PART OF EACH SAID UNIFORM CROSS-SECTIONAL AREA SECTION TO FORM A PLURALITY OF ARC BARRIERS, AND INTERPOSED SECTIONS OF PROGRESSIVELY VARYING GRADED CROSS-SECTIONAL AREA IN CONTACT WITH
Claim 2
Dependent Claim
84 words
A HIGH VOLTAGE ELECTRIC FUSE COMPRISING AN OUTER CASING, AN ARC EXTINGUISHING POWER FILLING IN SAID CASING, TERMINAL CAPS ON SAID CASING AND A FUSIBLE ELEMENT EMBEDDED WITHIN THE ARC EXTINGUISHING POWDER INSAID CASING EXTENDING FROM ONE END CAP TO THE OTHER, SAID FUSIBLE ELEMENT INCLUDING SEVERAL SECTIONS OF UNIFORM CROSS-SEC TIONAL AREA, A CERAMIC ELEMENT SURROUNDING PART OF EACH SAID UNIFORM CROSS-SECTIONAL AREA SECTION TO FORM A PLURALITY OF ARC BARRIERS, AND INTERPOSED SECTIONS OF PROGRESSIVELY VARYING GRADED CROSS-SECTIONAL AREA IN CONTACT WITH
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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) | 1967-06-23 | 1967-12-23 | 1968-06-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-06-23 | 1971-12-23 | 1972-06-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-06-23 | 1975-12-23 | 1976-06-23 | $7700.00 | Window Closed / Lapsed |