US2818630A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for crimping fibers
Assignee: Dow Chemical Co
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Filing: 1954-05-10
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Granted: 1958-01-07
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Expires: 1974-05-10
Abstract
No abstract record available.
Inventors
- 👤 Boeuf Edgar W Le
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:55
CPC Classifications
D; D02; D02G; D02G1/00
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
55 words
A PROCESS FOR CRIMPING SYNTHETIC FIBERS COMPRISING PASSING A CONTINUOUS TOW OF SAID FIBERS BETWEEN THE NIP OF A PAIR OF DRIVEN PINCH ROLLS IN THE DIRECTIONS OF ROTATION OF SAID ROLLS, ONE ROLL, OF SAID PAIR BEING DRIVEN AT A PERIPHERAL SPEED AT LEAST 1.5 TIMES THAT OF THE OTHER ROLL OF SAID PAIR.
Claim 2
Dependent Claim
55 words
A PROCESS FOR CRIMPING SYNTHETIC FIBERS COMPRISING PASSING A CONTINUOUS TOW OF SAID FIBERS BETWEEN THE NIP OF A PAIR OF DRIVEN PINCH ROLLS IN THE DIRECTIONS OF ROTATION OF SAID ROLLS, ONE ROLL, OF SAID PAIR BEING DRIVEN AT A PERIPHERAL SPEED AT LEAST 1.5 TIMES THAT OF THE OTHER ROLL OF SAID PAIR.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1961-01-06 | 1961-07-08 | 1962-01-07 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1965-01-06 | 1965-07-08 | 1966-01-07 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1969-01-06 | 1969-07-08 | 1970-01-07 | $7700.00 | Window Closed / Lapsed |