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Patent US2449790A successfully refreshed from Google Patents.
US2449790A
Expired / Lapsed
US
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Separator
Assignee: Worthington Pump and Machinery Corp
•
Filing: 1945-03-17
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Granted: 1948-09-21
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Expires: 1965-03-17
Abstract
No abstract record available.
Inventors
- 👤 Joseph F Sebald
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 01:51
CPC Classifications
B; B04; B04C; B04C3/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1859010A
Cited
US1255533A
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US1664683A
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US1676511A
Cited
FR631961A
Cited
US1853496A
Cited
US1983213A
Cited
US2057667A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1951-09-21 | 1952-03-22 | 1952-09-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1955-09-21 | 1956-03-22 | 1956-09-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1959-09-21 | 1960-03-22 | 1960-09-21 | $7700.00 | Window Closed / Lapsed |