US2685251A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of blasting
Assignee: EIDP Inc
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Filing: 1949-05-27
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Granted: 1954-08-03
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Expires: 1969-05-27
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
2026-11-01 23:20
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/04
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
106 words
A METHOD OF BLASTING BENEATH THE SURFACE OF A DENSE FLUID MEDIUM, WHICH COMPRISES INTRODUCING INTO EACH OF A PLURALITY OF DESIRED SUBSURFACE BLASTING POSITIONS AT LEAST ONE RELATIVELY INSENSITIVE EXPLOSIVE CHARGE AT SUCH A DISTANCE FROM OTHER SAID POSITIONS THAT SYMPATHETICAL DETONATION BY OTHER CHARGES IN SAID OTHER POSITIONS IS PRECLUDED; LOCATING AT LEAST ONE PRESSURE IGNITABLE DETONATOR IN DETONATING RELATIONSHIP WITH SAID CHARGES; PLACING AN EXPLOSIVE PRIMING CHARGE IN PROXIMITY TO SAID DETONATORS; BRINGING ABOUT THE EXPLOSION OF SAID PRIMING CHARGE; AND THEREBY CAUSING PRESSURE-INDUCED IGNITION OF THE SAID DETONATORS, THE INITIATION OF THE RESPECTIVE DETONATOR CHARGES, AND THE DETONATION OF THE EXPLOSIVE CHARGES.
Claim 2
Independent Claim
106 words
A METHOD OF BLASTING BENEATH THE SURFACE OF A DENSE FLUID MEDIUM, WHICH COMPRISES INTRODUCING INTO EACH OF A PLURALITY OF DESIRED SUBSURFACE BLASTING POSITIONS AT LEAST ONE RELATIVELY INSENSITIVE EXPLOSIVE CHARGE AT SUCH A DISTANCE FROM OTHER SAID POSITIONS THAT SYMPATHETICAL DETONATION BY OTHER CHARGES IN SAID OTHER POSITIONS IS PRECLUDED; LOCATING AT LEAST ONE PRESSURE IGNITABLE DETONATOR IN DETONATING RELATIONSHIP WITH SAID CHARGES; PLACING AN EXPLOSIVE PRIMING CHARGE IN PROXIMITY TO SAID DETONATORS; BRINGING ABOUT THE EXPLOSION OF SAID PRIMING CHARGE; AND THEREBY CAUSING PRESSURE-INDUCED IGNITION OF THE SAID DETONATORS, THE INITIATION OF THE RESPECTIVE DETONATOR CHARGES, AND THE DETONATION OF THE EXPLOSIVE CHARGES.
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) | 1957-08-02 | 1958-02-01 | 1958-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-08-02 | 1962-02-01 | 1962-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-08-02 | 1966-02-01 | 1966-08-03 | $7700.00 | Window Closed / Lapsed |