US2880528A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Land leveling apparatus
Assignee: Individual
•
Filing: 1955-08-26
•
Granted: 1959-04-07
•
Expires: 1975-08-26
Abstract
No abstract record available.
Inventors
- 👤 Charles E Lusk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 14:58
CPC Classifications
A; A01; A01B; A01B31/00; E; E02; E02F; E02F3/00; E02F3/04; E02F3/76; E02F3/7663; E02F3/7672
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1845324A
Cited
US2160376A
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US2569835A
Cited
US2624960A
Cited
US2567805A
Cited
US2648921A
Cited
US2595289A
Cited
US2786285A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1962-04-06 | 1962-10-06 | 1963-04-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-04-06 | 1966-10-06 | 1967-04-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-04-06 | 1970-10-06 | 1971-04-07 | $7700.00 | Window Closed / Lapsed |