US2436681A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Vehicle
Assignee: National Aeronautics and Space Administration
•
Filing: 1943-12-08
•
Granted: 1948-02-24
•
Expires: 1963-12-08
Abstract
No abstract record available.
Inventors
- 👤 Carl E Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 01:43
CPC Classifications
B; B60; B60F; B60F3/00; B60F3/0007; B60F3/0015; B63; B63H; B63H1/00; B63H1/30; B63H1/34; B63H2001/342; B63H2001/344
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1393157A
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US1710809A
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US1836446A
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US1993260A
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FR47160E
Cited
US2226406A
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US2162198A
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US2149297A
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US2191211A
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US2286609A
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US2345201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-02-23 | 1951-08-25 | 1952-02-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-02-23 | 1955-08-25 | 1956-02-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-02-23 | 1959-08-25 | 1960-02-24 | $7700.00 | Window Closed / Lapsed |