US3660181A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Blasting slurry compositions containing calcium nitrate and method of preparation
Assignee: Ireco Inc
•
Filing: 1969-05-01
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Granted: 1972-05-02
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Expires: 1989-05-01
Abstract
Abstract Slurry blasting compositions of low water content and high density, including substantial proportions of calcium nitrate as an oxidizer component, can be sensitized in various ways to produce economical explosive compositions. Sensitizers may include aluminum powder, granular explosives such as smokeless powder, TNT, etc.; a particularly preferred sensitizer or fuel is ethylene glycol. Solid carbonaceous fuels and conventional thickeners may be added. The calcium nitrate may be produced directly from burned lime with nitric acid and/or other nitrates.
Inventors
- 👤 Robert B Clay
- 👤 Melvin A Cook
- 👤 Lex L Udy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 12:09
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
25 words
Composition according to claim 1 which contains at least 8% of ethylene glycol and wherein the thickener is cross-linked by a combination oxidation-reduction cross-linking system.
Claim 2
Dependent Claim
28 words
Composition according to claim 1 wherein the slurry contains sufficient gassing agent to hold its density below 1.2 grams per cubic centimeter under a pressure of 50 psi.
Claim 3
Dependent Claim
21 words
Composition according to claim 1 in which there is at least 20% by weight, based on total composition, of calcium nitrate.
Claim 4
Dependent Claim
13 words
Composition according to claim 1 which includes at least 8% of ethylene glycol.
Claim 5
Dependent Claim
36 words
Composition according to claim 1 which includes at least 10% of calcium nitrate, at least 8% of ethylene glycol, and not more than 8% of water, not including water of crystallization associated with said calcium nitrate.
Claim 6
Dependent Claim
42 words
Composition according to claim 1 which includes at least 5% of ethylene glycol, at least 10% of calcium nitrate, an oxidation-reduction cross-linked gel former, and sufficient gassing agent to keep the slurry density below 1.2 g/cc. under a pressure of 50 psi.
Claim 7
Dependent Claim
13 words
Composition according to claim 7 which includes finely divided aluminum as a fuel.
Claim 8
Dependent Claim
36 words
Composition according to claim 7 which includes at least 8% of ethylene glycol, at least 20% of calcium nitrate, and which is sensitive to detonation in a 2-inch column at 10* C by a standard booster.
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) | 1975-05-02 | 1975-11-01 | 1976-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-02 | 1979-11-01 | 1980-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-02 | 1983-11-01 | 1984-05-02 | $7700.00 | Window Closed / Lapsed |