Patent US3002574A successfully refreshed from Google Patents.
US3002574A
Expired / Lapsed
US
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System and implement for deep tillage of the soil
Assignee: Individual
•
Filing: 1956-01-26
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Granted: 1961-10-03
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Expires: 1976-01-26
Abstract
No abstract record available.
Inventors
- 👤 John R Padrick
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 19:08
CPC Classifications
E; E02; E02F; E02F9/00; E02F9/28; E02F9/2875; A; A01; A01B; A01B15/00; A01B15/02; A01B15/025; A01B35/00; A01B35/02; A01B35/10; A01B35/14
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1302543A
Cited
US1885231A
Cited
US2129453A
Cited
US2669067A
Cited
US2684617A
Cited
US2757595A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1964-10-02 | 1965-04-03 | 1965-10-03 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-10-02 | 1969-04-03 | 1969-10-03 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-10-02 | 1973-04-03 | 1973-10-03 | $7700.00 | Window Closed / Lapsed |