US3047969A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Land leveler
Assignee: Individual
•
Filing: 1959-11-27
•
Granted: 1962-08-07
•
Expires: 1979-11-27
Abstract
No abstract record available.
Inventors
- 👤 George W Purdy
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 01:55
CPC Classifications
A; A01; A01B; A01B31/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US425793A
Cited
US1317037A
Cited
US1743532A
Cited
US982309A
Cited
US1797288A
Cited
US1711350A
Cited
US1864042A
Cited
US2160193A
Cited
US2093766A
Cited
US2101567A
Cited
US2513129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1965-08-06 | 1966-02-05 | 1966-08-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1969-08-06 | 1970-02-05 | 1970-08-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1973-08-06 | 1974-02-05 | 1974-08-07 | $7700.00 | Window Closed / Lapsed |