US2669171A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disk tiller
Assignee: Deere and Co
•
Filing: 1948-10-09
•
Granted: 1954-02-16
•
Expires: 1968-10-09
Abstract
No abstract record available.
Inventors
- 👤 Walter H Silver
- 👤 John I Cantral
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 09:11
CPC Classifications
A; A01; A01B; A01B21/00; A01B21/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1216123A
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US1635019A
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US1670838A
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AU1951429A
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US1832649A
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US1805974A
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US2008483A
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US2070425A
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US2245374A
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US2377410A
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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 |