Patent US3256409A successfully refreshed from Google Patents.
US3256409A
Expired / Lapsed
US
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Current-limiting electric fuse
Assignee: General Electric Co
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Filing: 1964-06-22
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Granted: 1966-06-14
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Expires: 1984-06-22
Abstract
No abstract record available.
Inventors
- 👤 Thomas F Brandt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 05:36
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/05; H01H85/055; H01H85/08; H01H85/10
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
110 words
IN A CURRENT-LIMITING ELECTRIC FUSE COMPRISING A HOLLOW CASING OF INSULATING MATERIAL, CONDUCTIVE END MEMBERS AT OPPOSITE ENDS OF SAID CASING, A GRANULAR FILLER WITHIN SAID CASING, AND A CONDUCTIVE FUSE ELEMENT OF WIREFORM IMBEDDED WITHIN SAID FILLER AND ELECTRICALLY INTERCONNECTING SAID END MEMBERS, SAID FUSIBLE ELEMENT BEING SURROUNDED BY SAID FILLER ABOUT ITS ENTIRE PERIPHERY OVER MOST OF ITS LENGTH; SAID FUSIBLE ELEMENT HAVING AT LEAST ONE NOTCH FORMED THEREIN AT A LOCATION INTERMEDIATE ITS ENDS, SAID NOTCH EXTENDING ABOUT THE CIRCUMFERENCE OF SAID FUSIBLE ELEMENT AND HAVING A ROUNDED ROOT THAT DEFINES A REGION OF MINIMUM CROSS SECTION, AN INTERNAL VOID IN SAID FUSIBLE ELEMENT EXTENDING LONGITUDINALLY THEREOF
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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) | 1969-06-13 | 1969-12-13 | 1970-06-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-06-13 | 1973-12-13 | 1974-06-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-06-13 | 1977-12-13 | 1978-06-14 | $7700.00 | Window Closed / Lapsed |