Patent US2990674A successfully refreshed from Google Patents.
US2990674A
Expired / Lapsed
US
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Turbine driven false twist spindle
Assignee: Celanese Corp
•
Filing: 1953-08-25
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Granted: 1961-07-04
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Expires: 1973-08-25
Abstract
No abstract record available.
Inventors
- 👤 Reiner G Stoll
- 👤 Hans R Stucki
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 21:04
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/04; D02G1/06
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
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US2659193A
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US2863280A
Cited
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 |