US4402774A
Expired / Lapsed
US
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Pyrotechnic composition
Assignee: HI-SHEAR Corp A CORP OF
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Filing: 1981-11-20
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Granted: 1983-09-06
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Expires: 2001-11-20
Abstract
Abstract A pyrotechnic composition comprising a mixture of finely divided magnesium and silicon dioxide, both distributed throughout a binder selected from the members of the group consisting of polybutadienes and teflon. The composition is suitably insensitive, and yet readily ignitable, and does not require the use of solvents or of expensive spheroidal magnesium granules for its manufacture.
Inventors
- 👤 Donald E. Olander
- 👤 Donald W. Petersen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-10 02:00
CPC Classifications
C; C06; C06B; C06B33/00; C06B45/00; C06B45/04; C06B45/06; C06B45/10
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
65 words
A pyrotechnic composition consisting essentially of, by weight, between about 40% and about 70% of finely divided magnesium metal, between about 5% to about 20% of a binder selected from the group consisting of polybutadiene, teflon, and mixtures thereof, and between about 7.5% and about 60% of silicon dioxide to make 100%, said magnesium and silicon dioxide being fully divided and mixed into said binder.
Claim 2
Dependent Claim
65 words
A pyrotechnic composition consisting essentially of, by weight, between about 40% and about 70% of finely divided magnesium metal, between about 5% to about 20% of a binder selected from the group consisting of polybutadiene, teflon, and mixtures thereof, and between about 7.5% and about 60% of silicon dioxide to make 100%, said magnesium and silicon dioxide being fully divided and mixed into said binder.
Claim 3
Dependent Claim
16 words
A pyrotechnic composition acccording to claim 1 in which said composition further includes an additional oxidizer.
Claim 4
Dependent Claim
19 words
A pyrotechnic composition according to claim 2 in which said additional oxidizer is teflon or potassium perchlorate, or both.
Claim 5
Dependent Claim
34 words
A pyrotechnic composition according to claim 1 in which the magnesium, and silicon dioxide proportions are about 60% and about 28% respectively, and in which the binder is polybutadiene, whose proportion is about 12%.
Claim 6
Dependent Claim
45 words
A pyrotechnic composition according to claim 1 in which the magnesium and silicon dioxide proportions are about 45% to about 10% respectively, in which the binder is polybutadiene whose proportion is about 10%, and in which teflon is further included, whose proportion is about 35%.
Claim 7
Dependent Claim
46 words
A pyrotechnic composition according to claim 1 in which the magnesium and silicon dioxide proportions are about 70% and about 7.5%, respectively, in which the binder is polybutadiene whose proportion is about 7.5%, and in which potassium perchlorate is further included, whose proportion is about 15%.
Claim 8
Dependent Claim
34 words
A pyrotechnic composition according to claim 1 in which the magnesium and silicon dioxide proportions are about 40% and about 50%, respectively, and in which the binder is polybutadiene, whose proportion is about 10%.
References Cited (Backward Citations)
US2500097A
Cited
US3803074A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1986-09-05 | 1987-03-07 | 1987-09-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-09-05 | 1991-03-07 | 1991-09-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-09-05 | 1995-03-07 | 1995-09-06 | $7700.00 | Window Closed / Lapsed |