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US4963203A
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High- and low-temperature-stable thermite composition for producing high-pressure, high-velocity gases
Assignee: United States Department of Energy
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Filing: 1990-03-29
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Granted: 1990-10-16
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Expires: 2010-03-29
Abstract
Abstract A high- and low-temperature-stable thermite composition for producing high-pressure and high-velocity gases comprises an oxidizable metal, an oxidizing reagent, and a high-temperature-stable gas-producing additive selected from the group consisting of metal carbides and metal nitrides.
Inventors
- 👤 Danny L. Halcomb
- 👤 Jonathan H. Mohler
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 23:57
CPC Classifications
C; C06; C06B; C06B33/00; C06D; C06D5/00; C06D5/06
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
38 words
A high- and low-temperature-stable thermite composition for producing high-pressure, high-velocity gases, consisting essentially of (a) an oxidizable metal; (b) an oxidizing reagent; (c) a high-temperature-stable gas-producing additive selected from the group consisting of metal carbides and metal nitrides.
Claim 2
Dependent Claim
38 words
A high- and low-temperature-stable thermite composition for producing high-pressure, high-velocity gases, consisting essentially of (a) an oxidizable metal; (b) an oxidizing reagent; (c) a high-temperature-stable gas-producing additive selected from the group consisting of metal carbides and metal nitrides.
Claim 3
Dependent Claim
22 words
The composition of claim 1, wherein: (a) said oxidizable metal is selected from the group consisting of AlSi, AlMg, Mg and aluminum.
Claim 4
Dependent Claim
27 words
The composition of claim 1, wherein: (a) said oxidizable metal is provided in the range of from about 7.5% to about 35.5% by weight of the composition.
Claim 5
Dependent Claim
46 words
The composition of claim 1, wherein: (a) said oxidizing reagent is selected from the group consisting of CuO, Cu 2 O, Cr 2 O 3 , WO 3 , Fe 2 O 3 , Fe 3 O 4 , MnO 2 , and PbO 2 .
Claim 6
Dependent Claim
27 words
The composition of claim 1, wherein: (a) said oxidizing reagent is provided in the range of from about 64.0% to about 92.0% by weight of the composition.
Claim 7
Dependent Claim
21 words
The composition of claim 1, wherein: (a) said metal carbide group is comprised of SiC, TiC, B 4 C and VC.
Claim 8
Dependent Claim
17 words
The composition of claim 1, wherein: (a) said metal nitride group is comprised of SiN and TiN.
Claim 9
Dependent Claim
27 words
The composition of claim 1, wherein: (a) said gas-producing additive is provided in the range of from about 0.5% to about 10% by weight of the composition.
Claim 10
Dependent Claim
19 words
The composition of claim 1, wherein: (a) the composition is thermally stable to a temperature of about 500° C.
Claim 11
Dependent Claim
81 words
A high- and low-temperature-stable thermite composition for producing high-pressure, high-velocity gases, comprising: (a) an oxidizable metal in the range of from about 7.5% to about 35.5% by weight of the composition; (b) an oxidizing reagent in the range of from about 64.0% to about 92.0% by weight of the composition; (c) a high-temperature-stable gas-producing additive in the range of from about 0.5% to about 10.0% by weight of composition and selected from the group consisting of metal carbides and metal nitrides.
Claim 12
Dependent Claim
81 words
A high- and low-temperature-stable thermite composition for producing high-pressure, high-velocity gases, comprising: (a) an oxidizable metal in the range of from about 7.5% to about 35.5% by weight of the composition; (b) an oxidizing reagent in the range of from about 64.0% to about 92.0% by weight of the composition; (c) a high-temperature-stable gas-producing additive in the range of from about 0.5% to about 10.0% by weight of composition and selected from the group consisting of metal carbides and metal nitrides.
Claim 13
Dependent Claim
22 words
The composition of claim 10, wherein: (a) said oxidizable metal is selected from the group consisting of AlSi, AlMg, Mg and Al.
Claim 14
Dependent Claim
46 words
The composition of claim 10, wherein: (a) said oxidizing reagent is selected from the group consisting of CuO, Cu 2 O, Cr 2 O 3 , WO 3 , Fe 2 O 3 , Fe 3 O 4 , MnO 2 , and PbO 2 .
Claim 15
Dependent Claim
21 words
The composition of claim 10, wherein: (a) said metal carbide group is comprised of SiC, TiC, B 4 C and VC.
Claim 16
Dependent Claim
17 words
The composition of claim 10, wherein: (a) said metal nitride group is comprised of SiN and TiN.
Claim 17
Dependent Claim
52 words
The composition of claim 10, wherein: (a) said oxidizable metal is Al and comprises about 17.5% by weight of the composition; (b) said oxidizing reagent is CuO and comprises about 79.5% by weight of the composition; and (c) said gas-producing additive is SiC and comprises about 3.0% by weight of the composition.
Claim 18
Dependent Claim
52 words
The composition of claim 10, wherein: (a) said oxidizable metal is Al and comprises about 20% by weight of the composition; (b) said oxidizing reagent is CuO and comprises about 77% by weight of the composition; and (c) said gas-producing additive is SiC and comprises about 3.0% by weight of the composition.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1993-10-15 | 1994-04-16 | 1994-10-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-10-15 | 1998-04-16 | 1998-10-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-10-15 | 2002-04-16 | 2002-10-16 | $7700.00 | Window Closed / Lapsed |