Patent US3023718A successfully refreshed from Google Patents.
US3023718A
Expired / Lapsed
US
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Depth regulating means for a furrow opener
Assignee: Deere and Co
•
Filing: 1957-10-25
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Granted: 1962-03-06
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Expires: 1977-10-25
Abstract
No abstract record available.
Inventors
- 👤 Knud B Sorensen
- 👤 Arthur J Bjerkan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 20:24
CPC Classifications
A; A01; A01C; A01C7/00; A01C7/20; A01C7/201; A01C7/203; Y; Y10; Y10S; Y10S111/00; Y10S111/927
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1927153A
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US1851196A
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US2249874A
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US2554061A
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US2698114A
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US2789736A
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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) | 1965-03-05 | 1965-09-04 | 1966-03-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-03-05 | 1969-09-04 | 1970-03-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-03-05 | 1973-09-04 | 1974-03-06 | $7700.00 | Window Closed / Lapsed |