US2920523A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of charging water-filled blast holes with ammonium nitrate and primer cartridge used in same
Assignee: Airmite Midwest Inc
•
Filing: 1957-06-04
•
Granted: 1960-01-12
•
Expires: 1977-06-04
Abstract
No abstract record available.
Inventors
- 👤 Barco John Frank
- 👤 Albon Dean Elliott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:44
CPC Classifications
F; F42; F42D; F42D1/00; F42D1/08
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
79 words
IN THE LOADING OF AN IRREGULAR WATER-FILLED BLAST HOLE WITH AN EXPLOSIVE CHARGE COMPRISING PRILLED AMMONIUM NITRATE AND A PRIMER CARTRIDGE OF LIQUID OXYGEN EXPLOSIVE, THE METHOD COMPRISING THE STEPS OF: DEPOSITING A CARTRIDGE UNIT OF LIQUID OXYGEN EXPLOSIVE IN A TUBULAR CONTAINER, CAPPING THE CONTAINER, LOWERING THE CONTAINER INTO THE WATER-FILLED BOTTOM PORTION OF THE BLAST HOLE, AND DEPOSITING WATERPROOFED PRILLIES OF AMMONIUM NITRATE IN SAID HOLE ABOUT SAID CONTAINER TO COMPLETELY FILL THE VOIDS ABOUT SAID CONTAINER.
Claim 2
Dependent Claim
79 words
IN THE LOADING OF AN IRREGULAR WATER-FILLED BLAST HOLE WITH AN EXPLOSIVE CHARGE COMPRISING PRILLED AMMONIUM NITRATE AND A PRIMER CARTRIDGE OF LIQUID OXYGEN EXPLOSIVE, THE METHOD COMPRISING THE STEPS OF: DEPOSITING A CARTRIDGE UNIT OF LIQUID OXYGEN EXPLOSIVE IN A TUBULAR CONTAINER, CAPPING THE CONTAINER, LOWERING THE CONTAINER INTO THE WATER-FILLED BOTTOM PORTION OF THE BLAST HOLE, AND DEPOSITING WATERPROOFED PRILLIES OF AMMONIUM NITRATE IN SAID HOLE ABOUT SAID CONTAINER TO COMPLETELY FILL THE VOIDS ABOUT SAID CONTAINER.
References Cited (Backward Citations)
US2704515A
Cited
US2733658A
Cited
US1863921A
Cited
US2311721A
Cited
US2441397A
Cited
US2463709A
Cited
US2586541A
Cited
US2789504A
Cited
US2703528A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-01-11 | 1963-07-13 | 1964-01-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-01-11 | 1967-07-13 | 1968-01-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-01-11 | 1971-07-13 | 1972-01-12 | $7700.00 | Window Closed / Lapsed |