US2429436A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Combined gravity classification and screening of ore
Assignee: Wyeth Holdings LLC
•
Filing: 1944-08-31
•
Granted: 1947-10-21
•
Expires: 1964-08-31
Abstract
No abstract record available.
Inventors
- 👤 Walker Godfrey Buchanan
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 11:03
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30
Claims Analysis
Total Claims: 0
No claims parsed yet. Click Sync Now above to re-index claims from Google Patents.
References Cited (Backward Citations)
US1392401A
Cited
US1451067A
Cited
US1559937A
Cited
US1685521A
Cited
US2151175A
Cited
US2191805A
Cited
US2206980A
Cited
US2203601A
Cited
US2360129A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1950-10-20 | 1951-04-21 | 1951-10-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1954-10-20 | 1955-04-21 | 1955-10-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1958-10-20 | 1959-04-21 | 1959-10-21 | $7700.00 | Window Closed / Lapsed |