Patent US2489953A successfully refreshed from Google Patents.
US2489953A
Expired / Lapsed
US
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Projectile operating with rocket propulsion
Assignee: Individual
•
Filing: 1944-09-04
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Granted: 1949-11-29
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Expires: 1964-09-04
Abstract
No abstract record available.
Inventors
- 👤 Burney Charles Dennistoun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 15:28
CPC Classifications
F; F42; F42B; F42B15/00; F42B10/00; F42B10/02; F42B10/26; F42B10/28; F42B10/30
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US328919A
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GB189625945A
Cited
US785644A
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US976732A
Cited
US1141042A
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US1633710A
Cited
US1901852A
Cited
US2005913A
Cited
FR831487A
Cited
GB516865A
Cited
FR54100E
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |