US2732800A
Expired / Lapsed
US
⏱️ 0.0 years remaining
coursen
Assignee: —
•
Filing: —
•
Granted: 1956-01-31
•
Expires: 1973-01-31
Abstract
No abstract record available.
Inventors
No inventors recorded.
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:24
CPC Classifications
F; F42; F42D; F42D5/00; F42B; F42B3/00; F42B3/04; F42B3/06; Y; Y10; Y10S; Y10S102/00; Y10S102/704
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
170 words
A BLASTING CARTRIDGE ASSEMBLY COMPRISING IN COMBINATION WITH A PRESSURE-RESISTANT BLASTING TUBE AND PRESSURE-RESPONSIVE DISCHARGE MEANS, OF A SUBSTANTIALLY CYLINDRICAL GAS-GENERATING CHARGE HAVING A DIAMETER NOT EXCEEDING THREE-QUARTERS OF THE INSIDE DIAMETER OF SAID TUBE, SAID CHARGE CONTAINING IN LINEAR ARRANGEMENT AT LEAST THREE COMPOSITIONS, EACH CONTAINING AT LEAST 50% BY WEIGHT OF AMMONIUM NITRATE, THE FIRST OF SAID COMPOSITIONS AT ONE END OF SAID CHARGE CONTAINING UP TO 30% BY WEIGHT OF AN OXIDIZABLE FUEL AND BEING CAPABLE OF SELFSUSTAINED DEFLAGRATION AT ATMOSPHERIC PRESSURE, THE SECOND COMPOSITION AT THE OPPOSITE END OF SAID CHARGE CONTAINING UP TO 50% BY WEIGHT OF AN INERT COOLING SALT AND BEING CAPABLE OF SELF-SUSTAINED DEFLAGRATION ONLY AT APPROXIMATELY THE TEMPERATURE AND PRESSURE PRODUCED WITHIN THE TUBE BY THE DEFLAGRATION OF ALL OF THE OTHER COMPOSITIONS, AND AT LEAST ONE COMPOSITION CONTAINING A COMBUSTIBLE FUEL INTERPOSED BETWEEN SAID FIRST AND SECOND COMPOSITION CAPABLE OF SELF-SUSTAINED DEFLAGRATION ONLY AT APPROXIMATELY THE TEMPERATURE AND PRESSURE PRODUCED WITHIN THE TUBE BY THE DEFLAGRATION OF SAID FIRST COMPOSITION.
Claim 2
Dependent Claim
170 words
A BLASTING CARTRIDGE ASSEMBLY COMPRISING IN COMBINATION WITH A PRESSURE-RESISTANT BLASTING TUBE AND PRESSURE-RESPONSIVE DISCHARGE MEANS, OF A SUBSTANTIALLY CYLINDRICAL GAS-GENERATING CHARGE HAVING A DIAMETER NOT EXCEEDING THREE-QUARTERS OF THE INSIDE DIAMETER OF SAID TUBE, SAID CHARGE CONTAINING IN LINEAR ARRANGEMENT AT LEAST THREE COMPOSITIONS, EACH CONTAINING AT LEAST 50% BY WEIGHT OF AMMONIUM NITRATE, THE FIRST OF SAID COMPOSITIONS AT ONE END OF SAID CHARGE CONTAINING UP TO 30% BY WEIGHT OF AN OXIDIZABLE FUEL AND BEING CAPABLE OF SELFSUSTAINED DEFLAGRATION AT ATMOSPHERIC PRESSURE, THE SECOND COMPOSITION AT THE OPPOSITE END OF SAID CHARGE CONTAINING UP TO 50% BY WEIGHT OF AN INERT COOLING SALT AND BEING CAPABLE OF SELF-SUSTAINED DEFLAGRATION ONLY AT APPROXIMATELY THE TEMPERATURE AND PRESSURE PRODUCED WITHIN THE TUBE BY THE DEFLAGRATION OF ALL OF THE OTHER COMPOSITIONS, AND AT LEAST ONE COMPOSITION CONTAINING A COMBUSTIBLE FUEL INTERPOSED BETWEEN SAID FIRST AND SECOND COMPOSITION CAPABLE OF SELF-SUSTAINED DEFLAGRATION ONLY AT APPROXIMATELY THE TEMPERATURE AND PRESSURE PRODUCED WITHIN THE TUBE BY THE DEFLAGRATION OF SAID FIRST COMPOSITION.
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) | 1959-01-30 | 1959-08-01 | 1960-01-31 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-01-30 | 1963-08-01 | 1964-01-31 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-01-30 | 1967-08-01 | 1968-01-31 | $7700.00 | Window Closed / Lapsed |