Patent US2645550A successfully refreshed from Google Patents.
US2769727A
Expired / Lapsed
US
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Sizing and drying of filamentary material
Assignee: Celanese Corp
•
Filing: 1953-05-01
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Granted: 1956-11-06
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Expires: 1973-05-01
Abstract
No abstract record available.
Inventors
- 👤 Seth T Bowen
- 👤 Fortess Fred
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 21:02
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/263
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2015103A
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US2067219A
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US2418752A
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US2436978A
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US2609350A
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US2576915A
Cited
US2628176A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1959-11-06 | 1960-05-07 | 1960-11-06 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1963-11-06 | 1964-05-07 | 1964-11-06 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1967-11-06 | 1968-05-07 | 1968-11-06 | $7700.00 | Window Closed / Lapsed |