US2649735A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lead wire for initiating devices
Assignee: Hercules Powder Co
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Filing: 1948-07-15
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Granted: 1953-08-25
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Expires: 1968-07-15
Abstract
No abstract record available.
Inventors
- 👤 George B Feild
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:00
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; F42B3/103; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49002; Y10T29/49117; Y10T29/49194; Y10T29/49195
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
112 words
AN ELECTRIC BLASTING INITIATOR ASSEMBLY COMPRISING AN ELECTRIC BLASTING INITIATOR; A PAIR OF LEAD WIRES EXTENDING THEREFROM; AN ELECTRICAL SHUNT DISPOSED ADJACENT THR TERMINAL ENDS OF THE LEAD WIRES, SAID LEAD WIRES HAVING INITIALLY APPLIED INSULATION EXTENDING FROM THE INITIATOR TO A POINT SHORT OF THE TERMINAL ENDS; AND A SUBSTANTIALLY NONADHERING COATING OF TOUGH, DIELECTRIC, PLASTIC HOT-MELT COMPOSITION DISPOSED INTIMATELY ABOUT THE INITIALLY UNINSULATED PORTIONS OF THE SHUNTED LEAD WIRES AND EXTENDING A SHORT DISTANCE OVER THE INSULATION IN SUBSTANTIALLY AIRTIGHT AND WATERTIGHT RELATIONSHIP THEREWITH, SAID PLASTIC HOT-MELT COMPOSITION HAVING BEEN APPLIED BY DIPPING THE SHUNTED TERMINAL ENDS AND THE LEAD WIRE ADJACENT THERETO INTO A BATH OF THE MOLTEN COMPOSITION.
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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) | 1956-08-24 | 1957-02-23 | 1957-08-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-08-24 | 1961-02-23 | 1961-08-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-08-24 | 1965-02-23 | 1965-08-25 | $7700.00 | Window Closed / Lapsed |