Patent US2490609A successfully refreshed from Google Patents.
US2490609A
Expired / Lapsed
US
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Cargo handling apparatus
Assignee: Harnischfeger Corp
•
Filing: 1945-05-07
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Granted: 1949-12-06
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Expires: 1965-05-07
Abstract
No abstract record available.
Inventors
- 👤 Andersen Nils Peter Erik
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 03:32
CPC Classifications
B; B63; B63B; B63B27/00; B63B27/10; B63B27/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US305736A
Cited
US1428809A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-12-05 | 1953-06-06 | 1953-12-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-12-05 | 1957-06-06 | 1957-12-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-12-05 | 1961-06-06 | 1961-12-06 | $7700.00 | Window Closed / Lapsed |