Patent US3882208A successfully refreshed from Google Patents.
US3882208A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for production of spherical particles of a solid material
Assignee: United States Department of the Navy
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Filing: 1970-09-30
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Granted: 1975-05-06
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Expires: 1990-09-30
Abstract
Abstract A process for making spherical solid particles, especially useful for solid explosives and propellant ingredients, wherein the solid material, such as hydroxylammonium perchlorate, is subjected to a temperature above its melting in a liquid medium, such as tetrachloroethylene, and thereby being transformed into its molten state is passed through a series of successively lower temperatures of the same liquid medium to form the rounded particles.
Inventors
- 👤 Jr William Geresy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 07:46
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0066
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
58 words
A PROCESS FOR MAKING SPHERICAL PARTICLES OF A SOLID EXPLOSIVE OR PROPELLANT MATERIAL WHICH COMPRISES SUBJECTING SAID SOLID EXPOLSIVE OR PROPELLANT MATERIAL TO A TEMPERATURE ABOVE ITS MELTING POINT IN A LIQUID MEDIUM, PASSING THE MOLTEN SOLID THEREBY FORMED THROUGH A PROGRESSION TO SUCCESSIVELY LOWER TEMPERATURE ZONES OF THE SAME LIQUID MEDIUMS AND COLLECTING THE SOLIDIFIED SPHERICAL PARTICLES.
Claim 2
Dependent Claim
58 words
A PROCESS FOR MAKING SPHERICAL PARTICLES OF A SOLID EXPLOSIVE OR PROPELLANT MATERIAL WHICH COMPRISES SUBJECTING SAID SOLID EXPOLSIVE OR PROPELLANT MATERIAL TO A TEMPERATURE ABOVE ITS MELTING POINT IN A LIQUID MEDIUM, PASSING THE MOLTEN SOLID THEREBY FORMED THROUGH A PROGRESSION TO SUCCESSIVELY LOWER TEMPERATURE ZONES OF THE SAME LIQUID MEDIUMS AND COLLECTING THE SOLIDIFIED SPHERICAL PARTICLES.
Claim 3
Dependent Claim
53 words
The process of claim 1 wherein the solid material is subjected to a temperature of not more than about 4 to 5* centigrade above its melting point and wherein at least the last of said successfully lower temperature zones of liquid medium has a temperature below the melting point of said solid material.
Claim 4
Dependent Claim
63 words
The process of claim 2 wherein said liquid medium is defined by the characteristics of: (a) remaining a liquid at the temperature at which said solid material melts, (b) non-dissolving said solid material to any large extent, (c) unreactive with said solid material, (d) compatible with said solid material and, (e) having a density of less than the density of said solid material.
Claim 5
Dependent Claim
29 words
The process of claim 3 wherein the solid material is added to the liquid medium and agitated therein prior to being subjected to a temperature above its melting point.
Claim 6
Dependent Claim
34 words
The process of claim 3 wherein the solid material is added to the liquid medium, subjected to a temperature above its melting point in said liquid medium and simultaneously subjected to high speed agitation.
Claim 7
Dependent Claim
26 words
The process of claim 4 wherein the solid material is selected from the group consisting of hydroxylammonium perchlorate, urea, dinitrobenzene, trimitrotoluene, ammonium nitrate and potassium nitrate.
Claim 8
Dependent Claim
18 words
The process of claim 4 wherein the solid material is hydroxylammonium perchlorate and the liquid medium is tetrachloroethylene.
Claim 9
Dependent Claim
26 words
The process of claim 5 wherein the solid material is selected from the group consisting of hydroxylammonium perchlorate, urea, dinitrobenzene, trinitrotoluene, ammonium nitrate and potassium nitrate.
Claim 10
Dependent Claim
18 words
The process of claim 5 wherein the solid material is hydroxylammonium perchlorate and the liquid medium is tetrachloroethylene.
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) | 1978-05-05 | 1978-11-04 | 1979-05-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-05-05 | 1982-11-04 | 1983-05-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-05-05 | 1986-11-04 | 1987-05-06 | $7700.00 | Window Closed / Lapsed |