US2561139A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Winch, hoist, and the like
Assignee: SASGEN DERRICK CO
•
Filing: 1948-01-16
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Granted: 1951-07-17
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Expires: 1968-01-16
Abstract
No abstract record available.
Inventors
- 👤 Matthias F Sasgen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 15:50
CPC Classifications
B; B66; B66D; B66D1/00; B66D1/02; B66D1/04; B66D1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-07-16 | 1955-01-15 | 1955-07-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-07-16 | 1959-01-15 | 1959-07-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-07-16 | 1963-01-15 | 1963-07-17 | $7700.00 | Window Closed / Lapsed |