Patent US3718095A successfully refreshed from Google Patents.
US3718095A
Expired / Lapsed
US
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Burnout perforation for rocket propellants
Assignee: United States Department of the Army
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Filing: 1968-09-26
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Granted: 1973-02-27
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Expires: 1988-09-26
Abstract
Abstract A MEANS HAS BEEN PROVIDED TO UTILIZE THE PREVIOUSLY OPEN UNUSED CORE SPACE IN THE PROPELLANT GRAIN OF A ROCKET MOTOR THUS SAVING WASTED SPACED WHILE PROVIDING ADDITIONAL THRUST TO THE ROCKET. THE CORE SPACE IS FILLED WITH PROPELLLANT AND FILAMENTARY MEANS IS LOCATED IN THE NORMAL CORE SPACE OR A MORE RAPID BURNING PROPELLANT IS CAST IN THE NORMAL CORE SPACE. THE FILAMENTARY MEANS CAN CONSIST OF THIN METAL TUBES, STRANDS OF VERY HIGH BURNING RATE PRO- PELLANT OR SMALL HOLES DRILLED OR CAST THROUGH THE PROPELLANT IN THE NORMAL CORE SPACE.
Inventors
- 👤 J Munger
- 👤 S Tate
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 15:15
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/10; F02K9/12; F05; F05D; F05D2250/00; F05D2250/10; F05D2250/19; F05D2250/191
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) | 1976-02-27 | 1976-08-28 | 1977-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-02-27 | 1980-08-28 | 1981-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-02-27 | 1984-08-28 | 1985-02-27 | $7700.00 | Window Closed / Lapsed |