Patent US2726602A successfully refreshed from Google Patents.
US2726602A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blasting detonator
Assignee: EIDP Inc
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Filing: 1952-07-01
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Granted: 1955-12-13
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Expires: 1972-07-01
Abstract
No abstract record available.
Inventors
- 👤 Davis Clyde Oliver
- 👤 Lewis Harold Arthur
- 👤 Noddin George Adelbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 12:18
CPC Classifications
F; F42; F42C; F42C5/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
167 words
A DETONATOR FOR USE IN BLASTING OPERATIONS IN CONTACT WITH A DENSE LIQUID MEDIUM AND ADAPTED TO BE INITIATED BY PRESSURE RESULTING FROM A NEARBY EXPLOSION, SAID DETONATOR COMPRISING A COMPLETELY SEALED TUBULAR METAL SHELL CONTAINING A BASE CHARGE OF A DENSE, HIGHVELOCITY EXPLOSIVE, A COMPRESSED PRIMING CHARGE, AND, IN A PORTION OF THE SHELL IN IGNITION RELATIONSHIP WITH THE PRIMING CHARGE, SAID PORTION BEING AT LEAST TWICE AS LONG AS THE DIAMETER OF THE SHELL, A LOOSE, GRANULAR IGNITION COMPOSITION SUSCEPTIBLE TO IGNITION BY AN INCANDESCENT WIRE, THE COMBINED AIR SPACE PLUS THE VOIDS WITHIN SAID PORTION AMOUNTING TO 70-85% OF THE VOLUME OF SAID PORTION, THE WALLS OF SAID SHELL BEING OF A STRENGTH SUCH AS TO UNDERGO SUBSTANTIAL COLLAPSE AT STATIC PRESSURES GREATER THAN 2000 LB./SQ. IN., WHEREBY THE SHELL WALL IS COLLAPSED UNDER THE EFFECT OF PRESSURES GREATER THAN 2000 LB./SQ. IN. TRANSMITTED THROUGH A DENSE LIQUID MEDIUM AND WHEREIN THE IGNITION OF THE LOOSE IGNITION COMPOSITION IS PRODUCED BY SUCH WALL COLLAPSE.
Claim 2
Dependent Claim
167 words
A DETONATOR FOR USE IN BLASTING OPERATIONS IN CONTACT WITH A DENSE LIQUID MEDIUM AND ADAPTED TO BE INITIATED BY PRESSURE RESULTING FROM A NEARBY EXPLOSION, SAID DETONATOR COMPRISING A COMPLETELY SEALED TUBULAR METAL SHELL CONTAINING A BASE CHARGE OF A DENSE, HIGHVELOCITY EXPLOSIVE, A COMPRESSED PRIMING CHARGE, AND, IN A PORTION OF THE SHELL IN IGNITION RELATIONSHIP WITH THE PRIMING CHARGE, SAID PORTION BEING AT LEAST TWICE AS LONG AS THE DIAMETER OF THE SHELL, A LOOSE, GRANULAR IGNITION COMPOSITION SUSCEPTIBLE TO IGNITION BY AN INCANDESCENT WIRE, THE COMBINED AIR SPACE PLUS THE VOIDS WITHIN SAID PORTION AMOUNTING TO 70-85% OF THE VOLUME OF SAID PORTION, THE WALLS OF SAID SHELL BEING OF A STRENGTH SUCH AS TO UNDERGO SUBSTANTIAL COLLAPSE AT STATIC PRESSURES GREATER THAN 2000 LB./SQ. IN., WHEREBY THE SHELL WALL IS COLLAPSED UNDER THE EFFECT OF PRESSURES GREATER THAN 2000 LB./SQ. IN. TRANSMITTED THROUGH A DENSE LIQUID MEDIUM AND WHEREIN THE IGNITION OF THE LOOSE IGNITION COMPOSITION IS PRODUCED BY SUCH WALL COLLAPSE.
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) | 1958-12-12 | 1959-06-13 | 1959-12-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1962-12-12 | 1963-06-13 | 1963-12-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1966-12-12 | 1967-06-13 | 1967-12-13 | $7700.00 | Window Closed / Lapsed |