US2954086A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Cultivator attachment for crawler tractors
Assignee: Individual
•
Filing: 1958-05-27
•
Granted: 1960-09-27
•
Expires: 1978-05-27
Abstract
No abstract record available.
Inventors
- 👤 Louis S Butman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 20:48
CPC Classifications
A; A01; A01B; A01B33/00; A01B37/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1380137A
Cited
US1258683A
Cited
GB163906A
Cited
US1662392A
Cited
US1832926A
Cited
GB432330A
Cited
US2161486A
Cited
US2229497A
Cited
US2741968A
Cited
US2701169A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1963-09-27 | 1964-03-28 | 1964-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1967-09-27 | 1968-03-28 | 1968-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1971-09-27 | 1972-03-28 | 1972-09-27 | $7700.00 | Window Closed / Lapsed |