Patent US3248875A successfully refreshed from Google Patents.
US3248875A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Re-startable solid fuel rocket motor
Assignee: Individual
•
Filing: 1964-10-27
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Granted: 1966-05-03
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Expires: 1984-10-27
Abstract
No abstract record available.
Inventors
- 👤 Robert D Wolcott
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 19:03
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/94
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
104 words
A RESTARTABLE ROCKET MOTOR COMPRISING AN ELONGATED FIRING CHAMBER CLOSED AT THE FORWARD END AND OPENING REARWARDLY THROUGH A NOZZLE, A SOLID PROPELLANT WITHING SAID CHAMBER COMPRISING AN ELONGATED CONCENTRIC CYLINDRICAL CHARGES, A COMPLETE HEAT RESTRICTING MATERIAL SEPARATING SAID CYLINDRICAL CHARGES FROM EACH OTHER, AN INSULATING CAP IN THE FORWARD END OF THE CHAMBER CLOSING ONE END OF ALL OF THE CYLINDRICAL CHARGES, SAID CAP HAVING CIRCULAR RECESSES ADJACENT THE CHARGES, TO RECEIVE AND MAINTAIN THE RESTRICTING MATERIAL, MEANS FOR IGNITING THE INNERMOST CHARGE AND SEPARATE IGNITION MEANS FOR EACH REMAIN CHARGE FOR RESTARTING THE ADJACENT CHARGE AFTER THE SUCCEEDING INNER CHARGE HAS BURNED.
Claim 2
Dependent Claim
104 words
A RESTARTABLE ROCKET MOTOR COMPRISING AN ELONGATED FIRING CHAMBER CLOSED AT THE FORWARD END AND OPENING REARWARDLY THROUGH A NOZZLE, A SOLID PROPELLANT WITHING SAID CHAMBER COMPRISING AN ELONGATED CONCENTRIC CYLINDRICAL CHARGES, A COMPLETE HEAT RESTRICTING MATERIAL SEPARATING SAID CYLINDRICAL CHARGES FROM EACH OTHER, AN INSULATING CAP IN THE FORWARD END OF THE CHAMBER CLOSING ONE END OF ALL OF THE CYLINDRICAL CHARGES, SAID CAP HAVING CIRCULAR RECESSES ADJACENT THE CHARGES, TO RECEIVE AND MAINTAIN THE RESTRICTING MATERIAL, MEANS FOR IGNITING THE INNERMOST CHARGE AND SEPARATE IGNITION MEANS FOR EACH REMAIN CHARGE FOR RESTARTING THE ADJACENT CHARGE AFTER THE SUCCEEDING INNER CHARGE HAS BURNED.
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) | 1969-05-02 | 1969-11-01 | 1970-05-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1973-05-02 | 1973-11-01 | 1974-05-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1977-05-02 | 1977-11-01 | 1978-05-03 | $7700.00 | Window Closed / Lapsed |