Patent US5022131A successfully refreshed from Google Patents.
US4552736A
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US
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Potassium fluoride stabilized ammonium nitrate
Assignee: Olin Corp
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Filing: 1983-05-02
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Granted: 1985-11-12
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Expires: 2003-05-02
Abstract
Abstract The undesirable abrupt expansion and contraction of ammonium nitrate in the temperature range of use of a rocket motor and explosives (-55 DEG C. to 80 DEG C.) is eliminated by the addition of 0.5 to 2% by weight of a crystal growth inhibitor, specifically potassium fluoride (KF).
Inventors
- 👤 Indu B. Mishra
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 14:56
CPC Classifications
C; C06; C06B; C06B31/00; C06B31/28; C01; C01C; C01C1/00; C01C1/18
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
30 words
Ammonium nitrate-potassium fluoride mixed crystals wherein the weight per cent of potassium fluoride in the mixed crystal is within the range of from about 0.5% to about 2% by weight.
Claim 2
Dependent Claim
30 words
Ammonium nitrate-potassium fluoride mixed crystals wherein the weight per cent of potassium fluoride in the mixed crystal is within the range of from about 0.5% to about 2% by weight.
Claim 3
Dependent Claim
30 words
The Ammonium Nitrate of claim 1 in which the weight percent of Potassium Fluoride in the Ammonium Nitrate is within range of from about 1 percent to about 2 percent.
Claim 4
Independent Claim
42 words
A method of stabilizing ammonium nitrate which comprises the steps of: (a) heating the ammonium nitrate to the molten state, (b) adding a stabilizing amount of KF to the ammonium nitrate, and (c) cooling the ammonium nitrate to below the melting point.
Claim 5
Independent Claim
42 words
A method of stabilizing ammonium nitrate which comprises the steps of: (a) heating the ammonium nitrate to the molten state, (b) adding a stabilizing amount of KF to the ammonium nitrate, and (c) cooling the ammonium nitrate to below the melting point.
References Cited (Backward Citations)
US2590054A
Cited
US2657977A
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US2943928A
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US3212944A
Cited
US3428418A
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US4001377A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-11-11 | 1989-05-13 | 1989-11-12 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-11-11 | 1993-05-13 | 1993-11-12 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-11-11 | 1997-05-13 | 1997-11-12 | $7700.00 | Window Closed / Lapsed |