US2205503A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Concentration of comminuted materials from their mixtures
Assignee: Minerals Separation North American Corp
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Filing: 1939-02-25
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Granted: 1940-06-25
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Expires: 1959-02-25
Abstract
No abstract record available.
Inventors
- 👤 Trotter William
- 👤 Wilkinson Eltoft Wray
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 12:14
CPC Classifications
B; B03; B03D; B03D1/00; B03D1/02; B03D1/021; B03D1/001; B03D1/004; B03D1/01; B03D2203/00; B03D2203/02; Y; Y10; Y10S; Y10S209/00; Y10S209/901; Y10S209/902
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1943-06-25 | 1943-12-25 | 1944-06-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1947-06-25 | 1947-12-25 | 1948-06-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1951-06-25 | 1951-12-25 | 1952-06-25 | $7700.00 | Window Closed / Lapsed |