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US2670668A
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Rotary plow depth control device
Assignee: ERNEST OSCAR MUELLER
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Filing: 1949-01-28
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Granted: 1954-03-02
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Expires: 1969-01-28
Abstract
No abstract record available.
Inventors
- 👤 Konig Franz
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 01:05
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US177078A
Cited
FR368380A
Cited
FR395399A
Cited
US1897784A
Cited
US2063584A
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US2051443A
Cited
US2553522A
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 |