US3564845A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Membrane seal assembly for use with solid propellant rocket motors having selective zoning capabilities
Assignee: ATK Launch Systems LLC
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Filing: 1968-09-19
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Granted: 1971-02-23
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Expires: 1988-09-19
Abstract
Abstract A RUPTURABLE MEMBRANE SEAL ASSEMBLY FOR USE IN SEPARATING THE ZONES OFA SOLID PROPELLANT GRAIN IN A SOLID PROPELLANT ROCKET MOTOR HAVING SELECTIVE ZONING CAPABILITIES THAT WILL BE DISINTEGRATED, WHEN THE PRESSURE IN A GAS GENERATOR SEPARATED FROM THE SOLID PROPELLANT ROCKET MOTOR BY THE MEMBRANE SEAL ASSEMBLY BECOMES GREATER THAN THE PRESSURE IN THE SOLID PROPELLANT ROCKET MOTOR.
Inventors
- 👤 Isidore H Friedman Jr
- 👤 Glenn E Webb Jr
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 06:02
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/10; F02K9/12; F02K9/28; F02K9/94; F02K9/95; F02K9/97; F02K9/978; Y; Y10; Y10T; Y10T137/00; Y10T137/1624; Y10T137/1632; Y10T137/1647; Y10T137/1692; Y10T137/1714; Y10T137/1729; Y10T137/1737; Y10T137/1752
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) | 1974-02-22 | 1974-08-24 | 1975-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-02-22 | 1978-08-24 | 1979-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-02-22 | 1982-08-24 | 1983-02-23 | $7700.00 | Window Closed / Lapsed |