US3980741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method for the processing of black powder
Assignee: Dyno Industrier AS
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Filing: 1975-04-21
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Granted: 1976-09-14
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Expires: 1995-04-21
Abstract
Abstract A method of continuously processing meal black powder in order to make it suitable for use in fuses, wherein a conventionally produced meal black powder is blended with about 20 % of water; said moist black powder is compressed to a coherent body in the form of sheets; said sheets are rubbed through a sieve; said sieved powder is agglomerated into spherical grains; said grains are dried to a moisture content of about 1 % and are sieved in order to provide a fraction having a grain size in the range of 0.3 and 1.0 mm.
Inventors
- 👤 Kjell Lovold
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:44
CPC Classifications
C; C06; C06B; C06B21/00; C06B21/0033; C06B21/0066
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
82 words
A continuous process for treating meal black powder in order to produce black powder suitable for use in fuses, which comprises blending meal black powder with about 20% by weight of water, compressing the moist powder to a sufficient degree so as to obtain a coherent body, and thereafter rubbing through a sieve, agglomerating said sieved powder to spherical grains which are dried to a moisture content of about 1% and seiving to a grain size lying between 0.3 and 1.0 mm.
Claim 2
Dependent Claim
82 words
A continuous process for treating meal black powder in order to produce black powder suitable for use in fuses, which comprises blending meal black powder with about 20% by weight of water, compressing the moist powder to a sufficient degree so as to obtain a coherent body, and thereafter rubbing through a sieve, agglomerating said sieved powder to spherical grains which are dried to a moisture content of about 1% and seiving to a grain size lying between 0.3 and 1.0 mm.
Claim 3
Dependent Claim
14 words
The method of claim 1, wherein the powder is dried in a fluidized bed.
Claim 4
Dependent Claim
14 words
The method of claim 1, wherein the powder is dried with air at 70°C.
References Cited (Backward Citations)
US3660546A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1979-09-14 | 1980-03-15 | 1980-09-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-09-14 | 1984-03-15 | 1984-09-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-09-14 | 1988-03-15 | 1988-09-14 | $7700.00 | Window Closed / Lapsed |