Patent US2758531A successfully refreshed from Google Patents.
US2758531A
Expired / Lapsed
US
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Ground agitating and leveling attachment for implements
Assignee: Individual
•
Filing: 1953-02-09
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Granted: 1956-08-14
•
Expires: 1973-02-09
Abstract
No abstract record available.
Inventors
- 👤 Siems George
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 14:41
CPC Classifications
A; A01; A01B; A01B49/00; A01B49/02
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US407062A
Cited
US957322A
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US1086015A
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US1202562A
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US1842268A
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US2136851A
Cited
US2483204A
Cited
US2659290A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-08-14 | 1960-02-13 | 1960-08-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-08-14 | 1964-02-13 | 1964-08-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-08-14 | 1968-02-13 | 1968-08-14 | $7700.00 | Window Closed / Lapsed |