US3713918A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Urea stabilized gelled slurry explosive
Assignee: United States Department of the Interior
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Filing: 1970-11-18
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Granted: 1973-01-30
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Expires: 1990-11-18
Abstract
Abstract A highly stable cap sensitive explosive gel comprising ammonium nitrate, metallic fuel sensitizer, gelling agent, inorganic polyvalent metal salt cross-linking agent, phosphate buffer, water and urea in an amount of 0.3-0.7 weight percent. When urea is added in the same amounts to a composition including the above ingredients and NaCl, which NaCl is incorporated for the purpose of non-incendivity, a highly stable non-incendive explosive gel is formed.
Inventors
- 👤 D Forshey
- 👤 E Lisotto
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 13:33
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
77 words
In an explosive gel having the following composition on a weight basis: a. about 20-30 percent ammonium nitrate; b. about 0-25 percent alkali metal nitrate; c. about 2-40 percent metallic fuel sensitizer; d. about 1.0-3.0 percent gelling agent; e. about 0.5-1.0 percent inorganic polyvalent metal salt cross-linking agent; f. about 5-40 percent water; g. about 0-3.5 percent additional fuel; and h. about 0.2-0.5 percent phosphate buffer; the improvement comprising a stabilizer consisting of about 0.3-0.7 percent urea.
Claim 2
Dependent Claim
77 words
In an explosive gel having the following composition on a weight basis: a. about 20-30 percent ammonium nitrate; b. about 0-25 percent alkali metal nitrate; c. about 2-40 percent metallic fuel sensitizer; d. about 1.0-3.0 percent gelling agent; e. about 0.5-1.0 percent inorganic polyvalent metal salt cross-linking agent; f. about 5-40 percent water; g. about 0-3.5 percent additional fuel; and h. about 0.2-0.5 percent phosphate buffer; the improvement comprising a stabilizer consisting of about 0.3-0.7 percent urea.
Claim 3
Dependent Claim
68 words
The composition of claim wherein said ammonium nitrate content is about 45-55 percent; said alkali metal nitrate content is about 5-20 percent; said sensitizer is about 5-15 percent; said gelling agent is about 1.5-2.5 percent; said cross-linking agent is about 0.75-1.0 percent; said water is about 15-30 percent; said urea is about 0.3-0.5 percent; said additional fuel is about 0.5-1.0 percent; and said buffer is about 0.3 percent.
Claim 4
Dependent Claim
37 words
The composition of claim 1 wherein about 5-40 percent NaCl is also present; wherein said ammonium nitrate content is about 30-65 percent; said alkali metal nitrate is about 0-7.0 percent; and said sensitizer is about 3-12 percent.
Claim 5
Dependent Claim
37 words
The composition of claim 2 wherein about 7-15 percent NaCl is also present; wherein said ammonia nitrate content is about 40-50 percent; said alkali metal nitrate is about 3.5-5.0 percent; and said sensitizer is about 4-8 percent.
Claim 6
Dependent Claim
38 words
The composition of claim 3 wherein said sensitizer is flake aluMinum or a mixture of flake aluminum and atomized aluminum in which mixture flake aluminum is present in at least 3 percent by weight of the explosive composition.
Claim 7
Dependent Claim
38 words
The composition of claim 4 wherein said sensitizer is flake aluminum or a mixture of flake aluminum and atomized aluminum in which mixture flake aluminum is present in at least 3 percent by weight of the explosive composition.
Claim 8
Dependent Claim
12 words
The composition of claim 5 wherein said cross-linking agent is potassium dichromate.
Claim 9
Dependent Claim
12 words
The composition of claim 6 wherein said cross-linking agent is potassium dichromate.
Claim 10
Dependent Claim
42 words
The composition of claim 7 wherein said additional fuel is selected from the group consisting of sugar, starch, hydrocarbonaceous materials, carbonaceous materials, 1, 3, 5-trinitro- 1, 3, 5-triazacyclohexane, trinitrotoluene, dinitrotoluene, 1, 3, 5, 7-tetranitro- 1, 3, 5, 7-tetrazacyclooctane, dinitrobenzene and smokeless powder.
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) | 1976-01-30 | 1976-07-31 | 1977-01-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-30 | 1980-07-31 | 1981-01-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-30 | 1984-07-31 | 1985-01-30 | $7700.00 | Window Closed / Lapsed |