Staple-containing solid propellant grain and method of preparation
Abstract
Abstract SOLID PROPELLANT GRAINS CONTAINING ALIGNED METAL STAPLES AND A METHOD OF PREPARING THE SAME. IN THE METHOD OF THIS INVENTION, A SOLID PROPELLANT GRAIN CONTAINING METAL STAPLES ORIENTED PERPENDICULAR TO THE BURNING SURFACE IS PREPARED BY INTIMATELY MIXING METAL STAPLES WITH THE REMAINING PROPELLANT INGREDIENTS TO FORM A CASTABLE, DOUGHLIKE MIXTURE, CASTING THE MIXTURE INTO A MOLD, APPLYING A MAGNETIC FIELD TO ORIENT THE FRAGMENTS PERPENDICULAR TO THE BURNING SURFACE AND CURING THE ORIENTED MIXTURE. BY USING COMPOSITE STAPES CONTAINING BOTH A PROPELLANT FUEL METAL AND A FERROMAGNETIC METAL, THE STAPLES OF THIS INVENTION CAN BE ALIGNED WITHOUT UNDUE SACRIFICE OF FAVORABLE FUEL PROPERTIES.
Inventors
- 👤 David C Sayles
Bibliographic Details
Claims Analysis
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
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| 3.5 Years (Year 4) | 1974-08-09 | 1975-02-08 | 1975-08-10 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-08-09 | 1979-02-08 | 1979-08-10 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-08-09 | 1983-02-08 | 1983-08-10 | $7700.00 | Window Closed / Lapsed |