US3120737A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Rocket motor propellant
Assignee: Individual
•
Filing: 1961-02-17
•
Granted: 1964-02-11
•
Expires: 1981-02-17
Abstract
No abstract record available.
Inventors
- 👤 David G Holloway
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 08:32
CPC Classifications
F; F02; F02K; F02K9/00; F02K9/08; F02K9/10; F02K9/12
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
95 words
A SOLID PROPELLANT CHARGE COMPRISING A SERIES OF AXIALLY DISPOSED DISCS STACKED TOGETHER HAVING A CENTRAL AXIAL CAVITY OF UNIFORM DIAMETER, EACH OF SAID DISCS FORMING CONCENTRIC RINGS AROUND SAID CAVITY AND MADE OF SLOW-BURNING AND FAST-BURNING PROPELLANT, THE DISCS OF PROPELLANT SO ARRANGED INTERNALLY THAT UPON IGNITION THE CONSUMPTION OF THE FAST-BURNING PROPELLANT CHANGES THE CAVITY TO NOZZLE-SHAPE, SAID NOZZLE-SHAPED CAVITY THEREAFTER RETAINED DURING THE BURNING PERIOD BY THE PARTICULAR ARRANGEMENT OF THE PROPELLANT IN EACH OF THE DISCS CONTINUALLY MAINTAINING THE NOZZLE-SHAPE OF THE CAVITY BY THE UNBURNT SURFACE OF THE SLOW-BURNING PROPELLANT.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1967-02-10 | 1967-08-12 | 1968-02-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1971-02-10 | 1971-08-12 | 1972-02-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1975-02-10 | 1975-08-12 | 1976-02-11 | $7700.00 | Window Closed / Lapsed |