Patent US2669912A successfully refreshed from Google Patents.
US2669912A
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Apparatus for removing liquids from perforated rotating shells
Assignee: Beloit Iron Works Inc
•
Filing: 1949-05-13
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Granted: 1954-02-23
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Expires: 1969-05-13
Abstract
No abstract record available.
Inventors
- 👤 John E Goodwillie
- 👤 Hornbostel Lloyd
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 12:52
CPC Classifications
D; D21; D21F; D21F3/00; D21F3/02; D21F3/10; Y; Y10; Y10S; Y10S162/00; Y10S162/07
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
DE377440C
Cited
US1234543A
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DE329867C
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US1520489A
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US1892306A
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US1914742A
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US2054391A
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US2209759A
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US2338465A
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GB531879A
Cited
US2429689A
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US2415351A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-22 | 1957-08-24 | 1958-02-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-22 | 1961-08-24 | 1962-02-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-22 | 1965-08-24 | 1966-02-23 | $7700.00 | Window Closed / Lapsed |