Patent US2670672A successfully refreshed from Google Patents.
US2670672A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Field tiller
Assignee: Case LLC
•
Filing: 1950-12-06
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Granted: 1954-03-02
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Expires: 1970-12-06
Abstract
No abstract record available.
Inventors
- 👤 John M Markel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 15:29
CPC Classifications
A; A01; A01B; A01B63/00; A01B63/14; A01B63/24; A01B63/32; A01B63/16; A01B63/22
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1755808A
Cited
US1846457A
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US2319492A
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US2319458A
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US2324840A
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US2332741A
Cited
US2458091A
Cited
US2532577A
Cited
US2580100A
Cited
US2605686A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-03-01 | 1957-08-31 | 1958-03-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-03-01 | 1961-08-31 | 1962-03-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-03-01 | 1965-08-31 | 1966-03-02 | $7700.00 | Window Closed / Lapsed |