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Patent US2960171A successfully refreshed from Google Patents.
US2960171A
Expired / Lapsed
US
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Disk harrow and mounting frame
Assignee: Deere and Co
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Filing: 1956-07-13
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Granted: 1960-11-15
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Expires: 1976-07-13
Abstract
No abstract record available.
Inventors
- 👤 William P Oehler
- 👤 Charles H Youngberg
- 👤 Leslie W Johnson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 16:49
CPC Classifications
A; A01; A01B; A01B23/00; A01B23/04; A01B23/046; A01B21/00; A01B21/08; A01B21/083
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2336410A
Cited
US2349257A
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US2458091A
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US2552891A
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US2657511A
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US2694279A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-11-15 | 1964-05-16 | 1964-11-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-11-15 | 1968-05-16 | 1968-11-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-11-15 | 1972-05-16 | 1972-11-15 | $7700.00 | Window Closed / Lapsed |