Patent EP0106563A1 successfully refreshed from Google Patents.
US2640403A
Expired / Lapsed
US
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Cultivator depth control device
Assignee: Individual
•
Filing: 1950-04-14
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Granted: 1953-06-02
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Expires: 1970-04-14
Abstract
No abstract record available.
Inventors
- 👤 Bertram A Halverson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 19:43
CPC Classifications
B; B62; B62D; B62D51/00; B62D51/001; A; A01; A01B; A01B33/00; A01B33/02; A01B33/028; A01B33/08; A01B33/087
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US309337A
Cited
US2051443A
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CH226650A
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US2426529A
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US2406484A
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US2428973A
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US2564201A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1956-06-01 | 1956-12-01 | 1957-06-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1960-06-01 | 1960-12-01 | 1961-06-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1964-06-01 | 1964-12-01 | 1965-06-02 | $7700.00 | Window Closed / Lapsed |