Patent US3020372A successfully refreshed from Google Patents.
US3020372A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuse structures
Assignee: Chase Shawmut Co
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Filing: 1958-11-24
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Granted: 1962-02-06
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Expires: 1978-11-24
Abstract
No abstract record available.
Inventors
- 👤 Frederick J Kozacka
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 16:30
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/041; H01H85/044; H01H85/045; H01H85/0456
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
65 words
A FUSIBLE PROTECTIVE DEVICE COMPRISING AN INSULATING CASING A PULVERULENT ARC-QUENCHING FULGURITE-FORMING FILLER, INSIDE SAID CASING, A FUSIBLE ELEMENT IN RIBBON-FORM SUBMERSED IN SAID FILLER, SAID ELEMENT HAVING A FIRST ZONE OF REDUCED CROSS-SECTIONAL AREA SITUATED BETWEEN THE ENDS THEREOF, LOW FUSING POINT METAL OVERLAY MEANS ON SAID ELEMENT ADJACENT, SAID FIRST ZONE OF REDUCED CROSS-SECTION AL AREA, SAID ELEMENT HAVING ADDITIONAL ZONES OF REDUCED
Claim 2
Dependent Claim
65 words
A FUSIBLE PROTECTIVE DEVICE COMPRISING AN INSULATING CASING A PULVERULENT ARC-QUENCHING FULGURITE-FORMING FILLER, INSIDE SAID CASING, A FUSIBLE ELEMENT IN RIBBON-FORM SUBMERSED IN SAID FILLER, SAID ELEMENT HAVING A FIRST ZONE OF REDUCED CROSS-SECTIONAL AREA SITUATED BETWEEN THE ENDS THEREOF, LOW FUSING POINT METAL OVERLAY MEANS ON SAID ELEMENT ADJACENT, SAID FIRST ZONE OF REDUCED CROSS-SECTION AL AREA, SAID ELEMENT HAVING ADDITIONAL ZONES OF REDUCED
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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) | 1965-02-05 | 1965-08-07 | 1966-02-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-02-05 | 1969-08-07 | 1970-02-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-02-05 | 1973-08-07 | 1974-02-06 | $7700.00 | Window Closed / Lapsed |