US2463676A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Dry spinning apparatus and method for the production of artificial filaments
Assignee: Celanese Corp
•
Filing: 1945-06-18
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Granted: 1949-03-08
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Expires: 1965-06-18
Abstract
No abstract record available.
Inventors
- 👤 Joseph E Bludworth
- 👤 Hutson Canfield
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 04:26
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/04
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US1625548A
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US1838121A
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US1699220A
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US1950025A
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US2034008A
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US2044136A
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US2142121A
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US2161354A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1952-03-07 | 1952-09-06 | 1953-03-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1956-03-07 | 1956-09-06 | 1957-03-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1960-03-07 | 1960-09-06 | 1961-03-08 | $7700.00 | Window Closed / Lapsed |