Patent US4503004A successfully refreshed from Google Patents.
US4503004A
Expired / Lapsed
US
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Method of molding a red phosphorous pyrotechnic composition
Assignee: United States Department of the Army
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Filing: 1984-03-12
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Granted: 1985-03-05
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Expires: 2004-03-12
Abstract
Abstract A method of molding a red phosphorous pyrotechnic mix containing an epoxy nder, which is markedly improved by the addition of silica.
Inventors
- 👤 Peter D. Mirabella
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 08:37
CPC Classifications
C; C06; C06D; C06D3/00; C06B; C06B21/00; C06B21/0033; C06B21/0041; C06B23/00; C06B23/001; C06B45/00; C06B45/04; C06B45/06; C06B45/10; Y; Y10; Y10S; Y10S149/00; Y10S149/117
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
74 words
In an improved process of consolidating a pyrotechnic mix into a unitary tablet on a substantially less hazardous basis, said pyrotechnic mix consisting essentially of red phosphorous, sodium nitrate, and an epoxy binder, the improvement comprising adding silica to said pyrotechnic mix, automatically feeding said pyrotechnic mix to a mold, and automatically subjecting said molded pyrotechnic mix to a pressure of about 12,000 pounds per square inch for a dwell time of one second.
Claim 2
Dependent Claim
74 words
In an improved process of consolidating a pyrotechnic mix into a unitary tablet on a substantially less hazardous basis, said pyrotechnic mix consisting essentially of red phosphorous, sodium nitrate, and an epoxy binder, the improvement comprising adding silica to said pyrotechnic mix, automatically feeding said pyrotechnic mix to a mold, and automatically subjecting said molded pyrotechnic mix to a pressure of about 12,000 pounds per square inch for a dwell time of one second.
Claim 3
Dependent Claim
32 words
The process of claim 1 wherein said silica is added to said pyrotechnic mix in an amount between about 0.5 and 2.0 percent by weight based on the weight of said mix.
Claim 4
Dependent Claim
31 words
The process of claim 1 wherein said silica is added to said pyrotechnic mix in an amount up to about 1 percent by weight based on the weight of said mix.
Claim 5
Dependent Claim
10 words
The process of claim 3 wherein said silica is fumed.
Claim 6
Dependent Claim
10 words
The process of claim 3 wherein said silica is colloidal.
Claim 7
Dependent Claim
10 words
The process of claim 3 wherein said silica is pyrogenic.
Claim 8
Dependent Claim
10 words
The process of claim 3 wherein said silica is amorphous.
Claim 9
Dependent Claim
10 words
The process of claim 1 wherein said silica is synthetic.
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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) | 1988-03-04 | 1988-09-03 | 1989-03-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-03-04 | 1992-09-03 | 1993-03-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-03-04 | 1996-09-03 | 1997-03-05 | $7700.00 | Window Closed / Lapsed |