US2691928A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Soil working device
Assignee: Individual
•
Filing: 1949-07-12
•
Granted: 1954-10-19
•
Expires: 1969-07-12
Abstract
No abstract record available.
Inventors
- 👤 Cadwallader W Kelsey
- 👤 George W Done
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 09:39
CPC Classifications
A; A01; A01B; A01B33/00; A01B33/08; A01B33/082; B; B62; B62D; B62D51/00; B62D51/004
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
USRE16266E
Cited
US1345110A
Cited
FR609082A
Cited
US2176261A
Cited
US2154745A
Cited
US2250391A
Cited
US2317490A
Cited
US2433709A
Cited
US2545735A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-10-18 | 1958-04-19 | 1958-10-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-10-18 | 1962-04-19 | 1962-10-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-10-18 | 1966-04-19 | 1966-10-19 | $7700.00 | Window Closed / Lapsed |