Patent US2681476A successfully refreshed from Google Patents.
US2681476A
Expired / Lapsed
US
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Process and apparatus for separating trash from lint cotton and the like
Assignee: Lummus Industries Inc Co
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Filing: 1949-09-12
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Granted: 1954-06-22
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Expires: 1969-09-12
Abstract
No abstract record available.
Inventors
- 👤 Donald W Van Doorn
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 17:28
CPC Classifications
D; D01; D01G; D01G9/00
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US469559A
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US633383A
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US1023750A
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US1159168A
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US1444516A
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US1660682A
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US1713371A
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US2300978A
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US2372796A
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US2438047A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-06-21 | 1957-12-21 | 1958-06-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-06-21 | 1961-12-21 | 1962-06-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-06-21 | 1965-12-21 | 1966-06-22 | $7700.00 | Window Closed / Lapsed |