US3713852A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Exothermic hot topping composition
Assignee: EXOMET
•
Filing: 1970-10-05
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Granted: 1973-01-30
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Expires: 1990-10-05
Abstract
Abstract Minimized smoke evolution and controlled reaction of exothermic hot topping compositions are obtained by a mixture of an oxidizer and a fuel together with bulk or modifying constituents. The improved properties are achieved by control of composition and particle size of ingredients and in certain instances agglomerating the mixture into a pelletized form.
Inventors
- 👤 D Wiley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 20:18
CPC Classifications
B; B22; B22D; B22D27/00; B22D27/04; B22D27/06
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
189 words
A highly exothermic hot topping composition consisting essentially of: 50 to 80 per cent by weight oxidizer in the form of iron oxide having a particle size so that approximately 80 per cent by weight will pass a 10 mesh screen and be retained on a 150 mesh screen; 14 to 22 per cent by weight fuel in the form of a readily oxidizable metal in finely divided form selected from the group consisting of aluminum, titanium, magnesium, silicon, and alloys thereof, said readily oxidizable metal having a particle size so that approximately 85 percent by weight of said metal will pass a 30 mesh screen and be retained on a 100 mesh screen; 5 to 26 per cent by weight retardant selected from the groups consisting of ground fire clay, sand, foliated micaceous minerals, and siliceous volcanic rock containing 70 to 80 percent by weight silica for controlling the temperature of reaction of said oxidizer and said fuel so that said reaction takes place at or below 3,500*F; whereby, dense smoke evolution from said reaction is minimized by controlling particle size of said reactants and temperature of reaction.
Claim 2
Dependent Claim
189 words
A highly exothermic hot topping composition consisting essentially of: 50 to 80 per cent by weight oxidizer in the form of iron oxide having a particle size so that approximately 80 per cent by weight will pass a 10 mesh screen and be retained on a 150 mesh screen; 14 to 22 per cent by weight fuel in the form of a readily oxidizable metal in finely divided form selected from the group consisting of aluminum, titanium, magnesium, silicon, and alloys thereof, said readily oxidizable metal having a particle size so that approximately 85 percent by weight of said metal will pass a 30 mesh screen and be retained on a 100 mesh screen; 5 to 26 per cent by weight retardant selected from the groups consisting of ground fire clay, sand, foliated micaceous minerals, and siliceous volcanic rock containing 70 to 80 percent by weight silica for controlling the temperature of reaction of said oxidizer and said fuel so that said reaction takes place at or below 3,500*F; whereby, dense smoke evolution from said reaction is minimized by controlling particle size of said reactants and temperature of reaction.
References Cited (Backward Citations)
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GB673605A
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GB745668A
Cited
US2805145A
Cited
US2937425A
Cited
US3103721A
Cited
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US3325316A
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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 |