US3439394A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for making a splittable crimped tow
Assignee: Celanese Corp
•
Filing: 1964-07-13
•
Granted: 1969-04-22
•
Expires: 1984-07-13
Abstract
No abstract record available.
Inventors
- 👤 Jack N Gray
- 👤 George A Watson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:26
CPC Classifications
D; D02; D02J; D02J1/00; D02J1/18; D01; D01G; D01G1/00; D02G; D02G1/00; D02G1/12
Claims Analysis
Total Claims: 0
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References Cited (Backward Citations)
US2811770A
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US2983026A
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US3078542A
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US3144025A
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US3099064A
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GB962516A
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US3145429A
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US3266692A
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US3380131A
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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) | 1972-04-21 | 1972-10-21 | 1973-04-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1976-04-21 | 1976-10-21 | 1977-04-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1980-04-21 | 1980-10-21 | 1981-04-22 | $7700.00 | Window Closed / Lapsed |