US2607484A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for separating granular material
Assignee: Individual
•
Filing: 1949-06-08
•
Granted: 1952-08-19
•
Expires: 1969-06-08
Abstract
No abstract record available.
Inventors
- 👤 Jesse G Whitfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 11:57
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/32
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US896471A
Cited
GB184870A
Cited
US1517509A
Cited
US1470531A
Cited
US1478761A
Cited
FR680515A
Cited
US2003141A
Cited
US2362130A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1955-08-19 | 1956-02-18 | 1956-08-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1959-08-19 | 1960-02-18 | 1960-08-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1963-08-19 | 1964-02-18 | 1964-08-19 | $7700.00 | Window Closed / Lapsed |