Patent US4488486A successfully refreshed from Google Patents.
US4488486A
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Low brisance detonating cord
Assignee: United States Department of the Army
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Filing: 1982-12-16
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Granted: 1984-12-18
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Expires: 2002-12-16
Abstract
Abstract A low brisance detonating cord including an outer case of explosive material of predetermined detonating velocity and an inner core of explosive material concentrically carried in the outer core. The inner core has a detonating velocity greater than the outer core.
Inventors
- 👤 Robert E. Betts
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 07:52
CPC Classifications
F; F42; F42B; F42B3/00; F42B3/10; C; C06; C06C; C06C5/00; C06C5/04
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
95 words
A detonating cord of low brisance comprising: a. An outer core of explosive material of predetermined detonating velocity, and b. An inner core of explosive material concentrically carried in said outer core and in contiguous relationship therewith, said inner core having a detonating velocity higher than that of said outer core, said inner core disposed for transmitting detonation waves of predetermined velocity to said outer core, said outer core being defined by a sheath enclosing a first explosive, and said inner core including a second explosive carried in a central opening of said first explosive.
Claim 2
Dependent Claim
95 words
A detonating cord of low brisance comprising: a. An outer core of explosive material of predetermined detonating velocity, and b. An inner core of explosive material concentrically carried in said outer core and in contiguous relationship therewith, said inner core having a detonating velocity higher than that of said outer core, said inner core disposed for transmitting detonation waves of predetermined velocity to said outer core, said outer core being defined by a sheath enclosing a first explosive, and said inner core including a second explosive carried in a central opening of said first explosive.
Claim 3
Dependent Claim
28 words
A detonating cord as set forth in claim 1 wherein said detonating velocity of said first explosive is in the range of 10,000 to 21,000 feet per second.
Claim 4
Dependent Claim
28 words
A detonating cord as set forth in claim 2 wherein said detonating velocity of said second explosive is in the range of 1,000 to 10,000 feet per second.
References Cited (Backward Citations)
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US3590739A
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US3667391A
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US3730096A
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US4080902A
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US4328753A
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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) | 1987-12-18 | 1988-06-18 | 1988-12-18 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-12-18 | 1992-06-18 | 1992-12-18 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-12-18 | 1996-06-18 | 1996-12-18 | $7700.00 | Window Closed / Lapsed |