US4012246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Super fine PETN thin layer slurry explosive
Assignee: Teledyne Mccormick Selph
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Filing: 1975-10-14
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Granted: 1977-03-15
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Expires: 1995-10-14
Abstract
Abstract A cap-sensitive slurry explosive capable of propagating a high order detonation in thin layers and which has a high degree of safety for a cap-sensitive explosive. The slurry consists of a superfine grained explosive, suspended in an energetic, but non-self-explosive liquid matrix and contains no liquid explosive ingredient. The slurry resists dispersion in a variety of liquids including water and crude oil. In the preferred embodiments the slurries include penetaerythritol tetranitrate (PETN) in super fine particles, having an average particle size of 6.5 microns.
Inventors
- 👤 Charles D. Forrest
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:43
CPC Classifications
C; C06; C06B; C06B47/00; C06B47/14
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
113 words
An improved slurry explosive able to propagate in very thin layers comprising a mixture of, by weight: A. approximately 15% to 45% by weight of sensitized superfine particle penetaerythritol tetranitrate (PETN), said sensitized particles having an average diameter of approximately 6.5 microns and further comprising interstiticial voids defining a gas phase; and, B. approximately 45% to 27% by weight of a material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate; and C. approximately 10% by weight of a liquid anti-freeze agent; and D. approximately 0.5% to 0.7% of a material selected from the group consisting of guar gum and polyacrylamide; and E. a cross-linking agent; and F. water.
Claim 2
Dependent Claim
113 words
An improved slurry explosive able to propagate in very thin layers comprising a mixture of, by weight: A. approximately 15% to 45% by weight of sensitized superfine particle penetaerythritol tetranitrate (PETN), said sensitized particles having an average diameter of approximately 6.5 microns and further comprising interstiticial voids defining a gas phase; and, B. approximately 45% to 27% by weight of a material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate; and C. approximately 10% by weight of a liquid anti-freeze agent; and D. approximately 0.5% to 0.7% of a material selected from the group consisting of guar gum and polyacrylamide; and E. a cross-linking agent; and F. water.
Claim 3
Dependent Claim
41 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight: A. 45% of said sensitized superfine PETN; and B. 27 % of said material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate.
Claim 4
Dependent Claim
40 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight: A. 35% of said sensitized superfine PETN; and B. 33% of said material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate.
Claim 5
Dependent Claim
40 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight: A. 25% of said sensitized superfine PETN; and B. 39% of said material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate.
Claim 6
Dependent Claim
40 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight: A. 20% of said sensitized superfine PETN; and B. 42% of said material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate.
Claim 7
Dependent Claim
40 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight: A. 15% of said sensitized superfine PETN; and B. 45% of said material selected from the group consisting of ammonium nitrate, potassium, barium and sodium nitrate.
Claim 8
Dependent Claim
34 words
An improved slurry explosive as in claim 1, wherein said mixture comprises by weight, five drops per 100 grams of slurry of a 50% solution of titanium and antimonium lactate as said cross-linking agent.
Claim 9
Dependent Claim
26 words
An improved slurry explosive as in claim 1, wherein said liquid anti-freeze agent is selected from the group consisting of diethylene glycol, formamide and dimethyl formamide.
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) | 1980-03-14 | 1980-09-13 | 1981-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-03-14 | 1984-09-13 | 1985-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-03-14 | 1988-09-13 | 1989-03-15 | $7700.00 | Window Closed / Lapsed |