US3666575A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Solid propellant composition with burning rate catalyst
Assignee: United States Department of the Army
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Filing: 1970-03-10
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Granted: 1972-05-30
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Expires: 1990-03-10
Abstract
Abstract FREE RADICALS THAT CATALYZE THE BURNING RATE OF PROPELLANTS. SPECIFICALLY, THE FREE RADICAL COMPOUND, 2,2-DIP PHENYLPICRYLHYDRAZYL, INCREASES THE BURNING RATE OF PROPEL LANT COMPOSITIONS COMPRISED OF THE SPECIFIED FREE RADICAL COMPOUND AND OTHER MAJOR PROPELLANT INGREDIENTS CONSISTING OF THE INORGANIC OXIDIZER AMMONIUM PERCHLORATE, POLYBUTADIENE BINDER, OPTIONAL CATALYSTS (E.G., N-BUTYL FERROCENE OR FE2O3) AND ALUMINUM METAL POWDER. PROCESSING AIDS (E.G., LECITHIN) AND CURATIVES MAY BE USED IN MINOR AMOUNTS IN THE BASIC FORMULATION OR AS AN ADDITIVE TO THE PROPELLANT COMPOSITION.
Inventors
- 👤 Harold M Fisher
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 04:17
CPC Classifications
C; C06; C06B; C06B45/00; C06B45/04; C06B45/06; C06B45/10; C06B23/00; C06B23/007
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-05-30 | 1975-11-29 | 1976-05-30 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-05-30 | 1979-11-29 | 1980-05-30 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-05-30 | 1983-11-29 | 1984-05-30 | $7700.00 | Window Closed / Lapsed |