US2620069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method of and apparatus for separating materials of different specific gravity
Assignee: Individual
•
Filing: 1948-10-19
•
Granted: 1952-12-02
•
Expires: 1968-10-19
Abstract
No abstract record available.
Inventors
- 👤 Karl R Wendt
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 06:22
CPC Classifications
B; B07; B07B; B07B13/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2429436A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-12-02 | 1956-06-02 | 1956-12-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-12-02 | 1960-06-02 | 1960-12-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-12-02 | 1964-06-02 | 1964-12-02 | $7700.00 | Window Closed / Lapsed |