Patent US2689663A successfully refreshed from Google Patents.
US2689663A
Expired / Lapsed
US
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Drum lifter for industrial trucks
Assignee: Individual
•
Filing: 1952-02-05
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Granted: 1954-09-21
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Expires: 1972-02-05
Abstract
No abstract record available.
Inventors
- 👤 Ladd C Shramek
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 05:14
CPC Classifications
B; B66; B66F; B66F9/00; B66F9/06; B66F9/075; B66F9/12; B66F9/18; B66F9/187
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1760885A
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US2250475A
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US2272447A
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US2364493A
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US2399360A
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US2447300A
Cited
US2620937A
Cited
US2558388A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-09-20 | 1958-03-22 | 1958-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-09-20 | 1962-03-22 | 1962-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-09-20 | 1966-03-22 | 1966-09-21 | $7700.00 | Window Closed / Lapsed |