US2928560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Air-charged hydraulic unloader
Assignee: Individual
•
Filing: 1958-01-06
•
Granted: 1960-03-15
•
Expires: 1978-01-06
Abstract
No abstract record available.
Inventors
- 👤 George R Wilkin
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 05:49
CPC Classifications
B; B60; B60P; B60P1/00; B60P1/54; B60P1/5404; B60P1/5423; B60P1/5428
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US983426A
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US2334708A
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US2359112A
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US2424899A
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US2512150A
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US2614833A
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US2606001A
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US2605914A
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US2701655A
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US2797550A
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US2812868A
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US2836315A
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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) | 1963-03-15 | 1963-09-14 | 1964-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-03-15 | 1967-09-14 | 1968-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-03-15 | 1971-09-14 | 1972-03-15 | $7700.00 | Window Closed / Lapsed |