US2616560A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Machine for mining precious metals or stones in rivers beneath the surface thereof
Assignee: Individual
•
Filing: 1947-11-10
•
Granted: 1952-11-04
•
Expires: 1967-11-10
Abstract
No abstract record available.
Inventors
- 👤 Vogelpoel Willem Theodorus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-03 15:11
CPC Classifications
E; E21; E21C; E21C45/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US710813A
Cited
US1083128A
Cited
US1465010A
Cited
US1729070A
Cited
US2331135A
Cited
US2423651A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-11-04 | 1956-05-05 | 1956-11-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-11-04 | 1960-05-05 | 1960-11-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-11-04 | 1964-05-05 | 1964-11-04 | $7700.00 | Window Closed / Lapsed |