Patent US2554495A successfully refreshed from Google Patents.
US2554495A
Expired / Lapsed
US
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Apparatus for separating solids according to their specific gravities
Assignee: Individual
•
Filing: 1945-10-16
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Granted: 1951-05-29
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Expires: 1965-10-16
Abstract
No abstract record available.
Inventors
- 👤 Claude L Key
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 23:33
CPC Classifications
B; B03; B03B; B03B5/00; B03B5/28; B03B5/30; B03B5/36; B03B5/38
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
USRE22191E
Cited
US500662A
Cited
GB191225936A
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US1169292A
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US1456165A
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US1780830A
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US1721423A
Cited
US1911013A
Cited
US2320335A
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US2356648A
Cited
US2357566A
Cited
US2379184A
Cited
US2373635A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1954-05-28 | 1954-11-27 | 1955-05-29 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1958-05-28 | 1958-11-27 | 1959-05-29 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1962-05-28 | 1962-11-27 | 1963-05-29 | $7700.00 | Window Closed / Lapsed |