US2597036A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Endless digger type mine dredger
Assignee: Quandro Mining & Equipment Cor
•
Filing: 1947-11-01
•
Granted: 1952-05-20
•
Expires: 1967-11-01
Abstract
No abstract record available.
Inventors
- 👤 Jonas L Roe
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 07:50
CPC Classifications
E; E02; E02F; E02F3/00; E02F3/04; E02F3/08; E21; E21C; E21C47/00
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US750005A
Cited
US884960A
Cited
US1859659A
Cited
US1948606A
Cited
US2131189A
Cited
US2323493A
Cited
US2320196A
Cited
US2489635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-05-20 | 1955-11-19 | 1956-05-20 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-05-20 | 1959-11-19 | 1960-05-20 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-05-20 | 1963-11-19 | 1964-05-20 | $7700.00 | Window Closed / Lapsed |