Patent US2925872A successfully refreshed from Google Patents.
US2925872A
Expired / Lapsed
US
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Subsoiler farm tool
Assignee: Individual
•
Filing: 1957-04-05
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Granted: 1960-02-23
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Expires: 1977-04-05
Abstract
No abstract record available.
Inventors
- 👤 Clarence E Darnell
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 14:05
CPC Classifications
A; A01; A01B; A01B13/00; A01B13/08; A01B35/00; A01B35/02; A01B35/10; A01B35/14; Y; Y10; Y10T; Y10T403/00; Y10T403/32; Y10T403/32254; Y10T403/32426; Y10T403/32442; Y10T403/32451
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1100920A
Cited
US1064265A
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US2155044A
Cited
US2638832A
Cited
US2703518A
Cited
US2797629A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-02-22 | 1963-08-24 | 1964-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-02-22 | 1967-08-24 | 1968-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-02-22 | 1971-08-24 | 1972-02-23 | $7700.00 | Window Closed / Lapsed |