US2438424A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of fabricating track laying vehicle shoes
Assignee: National Aeronautics and Space Administration
•
Filing: 1944-05-18
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Granted: 1948-03-23
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Expires: 1964-05-18
Abstract
No abstract record available.
Inventors
- 👤 Carl E Swenson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:57
CPC Classifications
B; B21; B21K; B21K23/00; B21K23/02; B21H; B21H8/00; B62; B62D; B62D55/00; B62D55/08; B62D55/18; B62D55/20; Y; Y10; Y10T; Y10T29/00; Y10T29/49; Y10T29/49448; Y10T29/49449
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1473569A
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US1705802A
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US2107490A
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US2290109A
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US2312451A
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US2353124A
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US2354650A
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US2371051A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-03-23 | 1951-09-22 | 1952-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-03-23 | 1955-09-22 | 1956-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-03-23 | 1959-09-22 | 1960-03-23 | $7700.00 | Window Closed / Lapsed |