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US2433902A
Expired / Lapsed
US
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Railway truck
Assignee: North American Aviation Corp
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Filing: 1944-05-01
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Granted: 1948-01-06
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Expires: 1964-05-01
Abstract
No abstract record available.
Inventors
- 👤 Henrichsen Knut
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 08:45
CPC Classifications
B; B61; B61F; B61F3/00; B61F3/02; B61F3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2043542A
Cited
CH194630A
Cited
US2275153A
Cited
US2286608A
Cited
US2250988A
Cited
US2250650A
Cited
US2253042A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-01-05 | 1951-07-07 | 1952-01-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-01-05 | 1955-07-07 | 1956-01-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-01-05 | 1959-07-07 | 1960-01-06 | $7700.00 | Window Closed / Lapsed |