US1669820A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and means for effecting the separation of subdivided materials
Assignee: SUSQUEHANNA COLLIERIES Co
•
Filing: 1926-09-07
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Granted: 1928-05-15
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Expires: 1946-09-07
Abstract
No abstract record available.
Inventors
- 👤 Richard F Grant
- 👤 Edward B Worthington
- 👤 William L Jacobus
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 12:29
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/62; B03B5/623; B04; B04C; B04C11/00; B04C5/00; B04C5/12; B04C5/24
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) | 1931-05-15 | 1931-11-14 | 1932-05-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1935-05-15 | 1935-11-14 | 1936-05-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1939-05-15 | 1939-11-14 | 1940-05-15 | $7700.00 | Window Closed / Lapsed |