US2446220A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined crane and material-moving device
Assignee: Trackson Co
•
Filing: 1944-09-11
•
Granted: 1948-08-03
•
Expires: 1964-09-11
Abstract
No abstract record available.
Inventors
- 👤 Nicholas M Erdahl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 17:55
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/96; E02F3/961; B; B66; B66C; B66C23/00; B66C23/18; B66C23/36; B66C23/44; B66C2700/00; B66C2700/03; B66C2700/0321; B66C2700/0357; Y; Y10; Y10S; Y10S414/00; Y10S414/125
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US301347A
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US811191A
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US901144A
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US1477639A
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US1645014A
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US2081939A
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US2215025A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-08-03 | 1952-02-02 | 1952-08-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-08-03 | 1956-02-02 | 1956-08-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-08-03 | 1960-02-02 | 1960-08-03 | $7700.00 | Window Closed / Lapsed |