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Patent US2449947A successfully refreshed from Google Patents.
US2449947A
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US
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Heavy duty trailer and tractor lifting unit
Assignee: Individual
•
Filing: 1946-01-18
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Granted: 1948-09-21
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Expires: 1966-01-18
Abstract
No abstract record available.
Inventors
- 👤 Robert L Meadows
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:17
CPC Classifications
B; B60; B60P; B60P3/00; B60P3/06; B60P3/07; B62; B62D; B62D53/00; B62D53/04; B62D53/06; B62D53/061; B62D53/062
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE473690C
Cited
US1693869A
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FR807549A
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US2325869A
Cited
US2305148A
Cited
US2312769A
Cited
US2316760A
Cited
US2364365A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |