US2489564A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Apparatus for clearing land mines or mine fields
Assignee: Individual
•
Filing: 1945-08-31
•
Granted: 1949-11-29
•
Expires: 1965-08-31
Abstract
No abstract record available.
Inventors
- 👤 Toit Abraham Stefanus Jacob Du
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 17:02
CPC Classifications
F; F41; F41H; F41H11/00; F41H11/12; F41H11/16; F41H11/18
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US2231875A
Cited
US1305637A
Cited
US1035056A
Cited
GB103036A
Cited
US1263965A
Cited
US1272168A
Cited
US1289196A
Cited
US1361591A
Cited
GB205310A
Cited
US1505572A
Cited
US1613997A
Cited
US1542963A
Cited
DE665817C
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-11-28 | 1953-05-30 | 1953-11-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-11-28 | 1957-05-30 | 1957-11-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-11-28 | 1961-05-30 | 1961-11-29 | $7700.00 | Window Closed / Lapsed |