Patent US2440267A successfully refreshed from Google Patents.
US2440267A
Expired / Lapsed
US
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Propellant and process for manufacturing
Assignee: United States, WAR, Secretary of
•
Filing: 1939-03-20
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Granted: 1948-04-27
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Expires: 1959-03-20
Abstract
No abstract record available.
Inventors
- 👤 George C Hale
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 18:02
CPC Classifications
C; C06; C06B; C06B25/00; C06B25/18
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1716434A
Cited
US825168A
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US899855A
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US1090641A
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US1509393A
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US2008889A
Cited
GB473057A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-04-27 | 1951-10-27 | 1952-04-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-04-27 | 1955-10-27 | 1956-04-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-04-27 | 1959-10-27 | 1960-04-27 | $7700.00 | Window Closed / Lapsed |