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US2668989A
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Cotton hull extractor and cleaner
Assignee: Lummus Industries Inc Co
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Filing: 1948-07-08
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Granted: 1954-02-16
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Expires: 1968-07-08
Abstract
No abstract record available.
Inventors
- 👤 Arvel L Vandergriff
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-08 10:17
CPC Classifications
B; B02; B02B; B02B3/00; B02B3/08
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1383007A
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US1945783A
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US1962320A
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US2009047A
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US2087390A
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US2172319A
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US2307287A
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1957-02-15 | 1957-08-17 | 1958-02-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1961-02-15 | 1961-08-17 | 1962-02-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1965-02-15 | 1965-08-17 | 1966-02-16 | $7700.00 | Window Closed / Lapsed |