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Patent US2979136A successfully refreshed from Google Patents.
US2979136A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Planters
Assignee: Deere and Co
•
Filing: 1957-10-31
•
Granted: 1961-04-11
•
Expires: 1977-10-31
Abstract
No abstract record available.
Inventors
- 👤 William P Oehler
- 👤 Harold V Hansen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 17:08
CPC Classifications
A; A01; A01C; A01C7/00; A01C7/20; A01C7/208
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1941539A
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US2483011A
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US2748686A
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US2778290A
Cited
US2729157A
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US2736567A
Cited
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US2795180A
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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) | 1964-04-10 | 1964-10-10 | 1965-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-04-10 | 1968-10-10 | 1969-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-04-10 | 1972-10-10 | 1973-04-11 | $7700.00 | Window Closed / Lapsed |