US2990673A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process and apparatus for producing core yarns
Assignee: Celanese Corp
•
Filing: 1954-01-06
•
Granted: 1961-07-04
•
Expires: 1974-01-06
Abstract
No abstract record available.
Inventors
- 👤 Jr Eugene M Adkins
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:37
CPC Classifications
D; D02; D02G; D02G3/00; D02G3/22; D02G3/36; D02G3/367
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US128618A
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GB189613939A
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US2061498A
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US2076270A
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US2210884A
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US2234338A
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US2309095A
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US2526523A
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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) | 1964-07-03 | 1965-01-02 | 1965-07-04 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1968-07-03 | 1969-01-02 | 1969-07-04 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1972-07-03 | 1973-01-02 | 1973-07-04 | $7700.00 | Window Closed / Lapsed |