Patent US2669067A successfully refreshed from Google Patents.
US2669067A
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US
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Method of cultivating row crops
Assignee: ROBERT C CHATTIN
•
Filing: 1949-03-26
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Granted: 1954-02-16
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Expires: 1969-03-26
Abstract
No abstract record available.
Inventors
- 👤 Severance Joe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 15:06
CPC Classifications
A; A01; A01B; A01B39/00; A01B39/08; A01B39/085
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1473519A
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US1544632A
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US2060688A
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US2232523A
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US2364043A
Cited
DK22875A
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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) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |