US2486221A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Crane construction and apparatus
Assignee: Louden Machinery Co
•
Filing: 1944-02-24
•
Granted: 1949-10-25
•
Expires: 1964-02-24
Abstract
No abstract record available.
Inventors
- 👤 Ralph W Spafford
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:39
CPC Classifications
B; B66; B66C; B66C7/00; B66C7/12; B66C7/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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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) | 1952-10-24 | 1953-04-25 | 1953-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-10-24 | 1957-04-25 | 1957-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-10-24 | 1961-04-25 | 1961-10-25 | $7700.00 | Window Closed / Lapsed |