Patent US3712227A successfully refreshed from Google Patents.
US3712227A
Expired / Lapsed
US
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Electrically controlled solid rocket ignition system
Assignee: United States Department of the Air Force
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Filing: 1971-03-22
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Granted: 1973-01-23
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Expires: 1991-03-22
Abstract
Abstract An electrically controlled solid rocket ignition system including a resistance wire initiator for igniting pyrotechnic material. After ignition, a high voltage is applied between forward and aft electrodes which are positioned on or near the surface of the propellant. This produces an electrostatic field which permits controlled movement of heated ions and/or electrons from the flame zone to the remaining unignited surface of the propellant. Ignition delay time can thereby be precisely controlled.
Inventors
- 👤 S Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 22:05
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/95
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-01-23 | 1976-07-24 | 1977-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-01-23 | 1980-07-24 | 1981-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-01-23 | 1984-07-24 | 1985-01-23 | $7700.00 | Window Closed / Lapsed |