US2520433A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Directed missile
Assignee: Individual
•
Filing: 1941-11-10
•
Granted: 1950-08-29
•
Expires: 1961-11-10
Abstract
No abstract record available.
Inventors
- 👤 Marion B Robinson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 18:16
CPC Classifications
F; F42; F42C; F42C13/00; F42C13/02; F41; F41G; F41G7/00; F41G7/20; F41G7/22; F41G7/222; F41G7/2253; F41G7/2273; F41G7/228; F41G7/2293
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1181203A
Cited
US1307607A
Cited
FR522506A
Cited
GB441866A
Cited
GB472322A
Cited
FR797933A
Cited
FR831496A
Cited
FR832427A
Cited
FR836555A
Cited
US2255245A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1953-08-28 | 1954-02-27 | 1954-08-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1957-08-28 | 1958-02-27 | 1958-08-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1961-08-28 | 1962-02-27 | 1962-08-29 | $7700.00 | Window Closed / Lapsed |