US2989288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air hoist
Assignee: Gardner Denver Inc
•
Filing: 1955-06-03
•
Granted: 1961-06-20
•
Expires: 1975-06-03
Abstract
No abstract record available.
Inventors
- 👤 Ralph E Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 02:08
CPC Classifications
B; B66; B66D; B66D3/00; B66D3/18; B66D3/20; B66D3/22; B66D1/00; B66D1/02; B66D1/08; B66D2700/00; B66D2700/01; B66D2700/0125; B66D2700/0133
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US771761A
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US1555094A
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US2206703A
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DE880897C
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US2277864A
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US2500326A
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US2570833A
Cited
US2560853A
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US2600887A
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US2640502A
Cited
US2719696A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-06-19 | 1964-12-19 | 1965-06-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-06-19 | 1968-12-19 | 1969-06-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-06-19 | 1972-12-19 | 1973-06-20 | $7700.00 | Window Closed / Lapsed |