Patent US1950339A successfully refreshed from Google Patents.
Patent US2808487A successfully refreshed from Google Patents.
US2808487A
Expired / Lapsed
US
⏱️ 0.0 years remaining
High voltage fuses
Assignee: Chase Shawmut Co
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Filing: 1956-04-12
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Granted: 1957-10-01
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Expires: 1976-04-12
Abstract
No abstract record available.
Inventors
- 👤 Jr Philip C Jacobs
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 19:39
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/042
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
134 words
A CURRENT-LIMITING FUSE COMPRISING A CASING OF INSULATING MATERIAL, TERMINAL ELEMENTS ON THE OUTER ENDS OF SAID CASING, A RIBBON-TYPE FUSE LINK OF A METAL HAVING A RELATIVELY LOW RESISTIVITY AND A RELATIVELY LOW SPECIFIC HEAT CONDUCTIVELY INTERCONNECTING SAID TERMINAL ELEMENTS, A BODY OF A METAL ON SAID FUSE LINK HAVING A LOWER FUSING POINT THAN THE FUSING POINT OF THE METAL OF SAID FUSE LINK ADAPTED TO DESTROY SAID FUSE LINK BY A METALLURGICAL REACTION TAKING PLACE AT A TEMPERATURE BELOW THE FUSING POINT OF SAID METAL OF SAID FUSE LINK, AND A SLEEVE OF HEAT RESISTANT INORGANIC INSULATING MATERIAL TENDING TO GUIDE THE VAPORS OF SAID LOWER FUSING METAL RESULTING FROM DESTRUCTION OF SAID FUSE LINK BY SAID METALLURGICAL REACTION AND CONSEQUENT ARCING IN A DIRECTION SUBSTANTIALLY LONGITUDINALLY OF SAID FUSE LINK.
Claim 2
Dependent Claim
134 words
A CURRENT-LIMITING FUSE COMPRISING A CASING OF INSULATING MATERIAL, TERMINAL ELEMENTS ON THE OUTER ENDS OF SAID CASING, A RIBBON-TYPE FUSE LINK OF A METAL HAVING A RELATIVELY LOW RESISTIVITY AND A RELATIVELY LOW SPECIFIC HEAT CONDUCTIVELY INTERCONNECTING SAID TERMINAL ELEMENTS, A BODY OF A METAL ON SAID FUSE LINK HAVING A LOWER FUSING POINT THAN THE FUSING POINT OF THE METAL OF SAID FUSE LINK ADAPTED TO DESTROY SAID FUSE LINK BY A METALLURGICAL REACTION TAKING PLACE AT A TEMPERATURE BELOW THE FUSING POINT OF SAID METAL OF SAID FUSE LINK, AND A SLEEVE OF HEAT RESISTANT INORGANIC INSULATING MATERIAL TENDING TO GUIDE THE VAPORS OF SAID LOWER FUSING METAL RESULTING FROM DESTRUCTION OF SAID FUSE LINK BY SAID METALLURGICAL REACTION AND CONSEQUENT ARCING IN A DIRECTION SUBSTANTIALLY LONGITUDINALLY OF SAID FUSE LINK.
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) | 1960-09-30 | 1961-04-01 | 1961-10-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-30 | 1965-04-01 | 1965-10-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-30 | 1969-04-01 | 1969-10-01 | $7700.00 | Window Closed / Lapsed |