Patent US2804813A successfully refreshed from Google Patents.
US2804813A
Expired / Lapsed
US
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Tractor powered rotary cultivator
Assignee: MATLIN S NURSERY
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Filing: 1953-12-16
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Granted: 1957-09-03
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Expires: 1973-12-16
Abstract
No abstract record available.
Inventors
- 👤 Ritchie Coy Dayl
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 17:52
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US1765358A
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US1908836A
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US2196636A
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US2182157A
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US2215364A
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US2388689A
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US2329794A
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US2569464A
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US2669067A
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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) | 1960-09-02 | 1961-03-04 | 1961-09-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1964-09-02 | 1965-03-04 | 1965-09-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1968-09-02 | 1969-03-04 | 1969-09-03 | $7700.00 | Window Closed / Lapsed |