Patent US3496624A successfully refreshed from Google Patents.
US4294633A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blasting composition
Assignee: Individual
•
Filing: 1979-06-07
•
Granted: 1981-10-13
•
Expires: 1999-06-07
Abstract
Abstract A blasting composition of high solids content, usually of plastic solid consistency, is composed of 60 to 90 parts by weight of solid particulate oxidizer salt, which is mainly ammonium nitrate, preferably fertilizer grade prills, and 10 to 40% of liquid slurry partially filling the interstices and voids in and between the solid particles. The slurry is one that will not appreciably dissolve or soften the granules, hence it is preferably a substantially saturated and thickened solution, in non-aqueous solvent, of strong oxidizer salt, typically ammonium and/or calcium nitrate to which sodium nitrate may be added. The preferred solvent is a low molecular weight polar organic liquid, selected from the group consisting of methanol, ethylene glycol, formamide and ethanol. In some cases isopropanol or propylene glycol may be included. The slurry is of greater density than the bulk granular solids so that it will significantly increase the overall bulk density of the composition which should contain enough dispersed air to improve its sensitivity to detonation over that of a similar composition containing no air filled voids.
Inventors
- 👤 Robert B. Clay
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 09:15
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14
Claims Analysis
Total Claims: 15
Claim 1
Independent Claim
113 words
A blasting agent having a bulk density above 1.0 grams per cc. of generally solid or plastic solid consistency, based largely on particulate ammoniun nitrate, which comprises, in combination: (a) 60 to 90% by weight, based on the total, of solid particulate oxidizer sale which includes ammonium nitrate, and (b) 10 to 40% by weight of a thickened liquid component comprising a nitrate oxidizer salt dissolved in a polar organic solvent selected from the group which consists of methanol, ethylene glycol and, said solution being substantially fully saturated by said salt and only partially filling the interstices in component (a) to provide for sensitizing the overall composition to detonation by standard detonating devices.
Claim 2
Dependent Claim
113 words
A blasting agent having a bulk density above 1.0 grams per cc. of generally solid or plastic solid consistency, based largely on particulate ammoniun nitrate, which comprises, in combination: (a) 60 to 90% by weight, based on the total, of solid particulate oxidizer sale which includes ammonium nitrate, and (b) 10 to 40% by weight of a thickened liquid component comprising a nitrate oxidizer salt dissolved in a polar organic solvent selected from the group which consists of methanol, ethylene glycol and, said solution being substantially fully saturated by said salt and only partially filling the interstices in component (a) to provide for sensitizing the overall composition to detonation by standard detonating devices.
Claim 3
Dependent Claim
25 words
A composition according to claim 1 in which the solvent is methanol and in which a major proportion of the particulate solid is ammonium nitrate.
Claim 4
Dependent Claim
19 words
A composition according to claim 1 in which the solution contains a mixture of ammonium nitrate and calcium nitrate.
Claim 5
Dependent Claim
13 words
A composition according to claim 1 which includes a finely divided solid fuel.
Claim 6
Dependent Claim
14 words
A composition according to claim 4 in which the fuel comprises finely divided aluminum.
Claim 7
Dependent Claim
14 words
A composition according to claim 1 which includes finely divided aluminum in the solution.
Claim 8
Dependent Claim
13 words
A composition according to claim 1 in which the solvent comprises ethylene glycol.
Claim 9
Dependent Claim
12 words
A composition according to claim 1 in which the solvent is methanol.
Claim 10
Dependent Claim
23 words
A composition according to claim 1 in which the solvent comprises methanol and is thickened to a gel consistency with hydroxy ethyl cellulose.
Claim 11
Dependent Claim
59 words
A composition according to claim 1 in which the solid particulate salt is predominantly fertilizer grade ammonium nitrate, which includes fuel oil to improve oxygen balance, and in which the liquid component is a substantially saturated solution of ammonium nitrate and calcium nitrate in a polar organic solvent selected from the group which consists of methanol and ethylene glycol.
Claim 12
Dependent Claim
48 words
A composition according to claim 10 in which the solvent is methanol and the solution is thickened to a gel consistency with a hydroxy ethyl cellulose, the solution substantially but not completely filling the interstices between granules to enhance sensitivity by inclusion of air pockets in the composition.
Claim 13
Dependent Claim
12 words
Composition according to claim 10 in which the solvent is ethylene glycol.
Claim 14
Dependent Claim
15 words
Composition according to claim 10 which includes finely divided aluminum as a fuel and sensitizer.
Claim 15
Dependent Claim
30 words
Composition according to claim 10 which contains methanol as a solvent, a hydroxy ethyl cellulose as a thickener for the solution, and finely divided fuel particles suspended in the solution.
References Cited (Backward Citations)
US4111727A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1984-10-12 | 1985-04-13 | 1985-10-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-12 | 1989-04-13 | 1989-10-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-12 | 1993-04-13 | 1993-10-13 | $7700.00 | Window Closed / Lapsed |