US3227844A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fuse with hydrated arc extinguishing material
Assignee: McGraw Edison Co
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Filing: 1962-11-13
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Granted: 1966-01-04
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Expires: 1982-11-13
Abstract
No abstract record available.
Inventors
- 👤 Lawrence M Burrage
- 👤 Darrel D Mcstrack
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:28
CPC Classifications
H; H01; H01H; H01H85/00; H01H85/02; H01H85/04; H01H85/05; H01H85/18
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
99 words
IN A CURRENT LIMITING FUSE INCLUDING SPACED TERMINALS HAVING A FUSIBLE ELEMENT CONNECTED THEREBETWEEN ADAPTED TO VAPORIZE WHEN FUSING TEMPERATURE IS ATTAINED, WHEREBY HAVING THE FORMULA NA2O:3 SIO2 WITH APPROXIMATELY 17 PERCENT WATER IN CONTIGUITY WITH AND SURROUNDING SAID FUSIBLE ELEMENT THROUGHOUT A MAJOR PORTION OF THE LENGTH OF SAID FUSIBLE ELEMENT, SAID SILICATE EXPELLING SAID WATER AND BEING CHANGED TO THE VAPOR AND LIQUID STATE AS A RESULT OF THE HEAT OF THE ARC FORMED UPON VAPORIZATION OF SAID FUSIBLE ELEMENT AND RESULTING IN RAPID TRANSFER OF HEAT FROM THE ARC AND RAPID DISSIPATION OF THE ARC ENERGY.
Claim 2
Dependent Claim
99 words
IN A CURRENT LIMITING FUSE INCLUDING SPACED TERMINALS HAVING A FUSIBLE ELEMENT CONNECTED THEREBETWEEN ADAPTED TO VAPORIZE WHEN FUSING TEMPERATURE IS ATTAINED, WHEREBY HAVING THE FORMULA NA2O:3 SIO2 WITH APPROXIMATELY 17 PERCENT WATER IN CONTIGUITY WITH AND SURROUNDING SAID FUSIBLE ELEMENT THROUGHOUT A MAJOR PORTION OF THE LENGTH OF SAID FUSIBLE ELEMENT, SAID SILICATE EXPELLING SAID WATER AND BEING CHANGED TO THE VAPOR AND LIQUID STATE AS A RESULT OF THE HEAT OF THE ARC FORMED UPON VAPORIZATION OF SAID FUSIBLE ELEMENT AND RESULTING IN RAPID TRANSFER OF HEAT FROM THE ARC AND RAPID DISSIPATION OF THE ARC ENERGY.
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) | 1969-01-03 | 1969-07-05 | 1970-01-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-01-03 | 1973-07-05 | 1974-01-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-01-03 | 1977-07-05 | 1978-01-04 | $7700.00 | Window Closed / Lapsed |