US3316611A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for crimping a tow of vinyl alcohol polymer
Assignee: Rhodiaceta SA
•
Filing: 1965-02-24
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Granted: 1967-05-02
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Expires: 1985-02-24
Abstract
No abstract record available.
Inventors
- 👤 Terra Pierre Jean
- 👤 Finiels Gerard
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 04:48
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/12
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
91 words
PROCESS FOR THE CONTINUOUS PRODUCTION OF CRIMPED TOWS CONSISTING OF FILAMENTS OF VINYL ALCOHOL POLYMERS, WHICH COMPRISES SIMULTANEOUSLY HUMIDIFYING THE TOW AND RAISING ITS TEMPERATURE TO BETWEEN 70* AND 100*C. BY CONTACTING IT WITH WATER VAPOUR FREE FROM DROPLETS OF LIQUID WATER WHEREBY THE TOW ACQUIRES A DEGREE OF HUMIDITY AT LEAST 2% AND AT MOST EQUAL TO THE DEGREE OF SORPTION, IMMEDIATELY THEREAFTER MECHANICALLY CRIMPING THE TOW AT A TEMPERATURE OF 80*-150*C. IN A HEATED COMPRESSION CHAMBER, AND THEN COOLING THE TOW WHILE IT IS STILL IN A COMPRESSED STATE.
Claim 2
Dependent Claim
91 words
PROCESS FOR THE CONTINUOUS PRODUCTION OF CRIMPED TOWS CONSISTING OF FILAMENTS OF VINYL ALCOHOL POLYMERS, WHICH COMPRISES SIMULTANEOUSLY HUMIDIFYING THE TOW AND RAISING ITS TEMPERATURE TO BETWEEN 70* AND 100*C. BY CONTACTING IT WITH WATER VAPOUR FREE FROM DROPLETS OF LIQUID WATER WHEREBY THE TOW ACQUIRES A DEGREE OF HUMIDITY AT LEAST 2% AND AT MOST EQUAL TO THE DEGREE OF SORPTION, IMMEDIATELY THEREAFTER MECHANICALLY CRIMPING THE TOW AT A TEMPERATURE OF 80*-150*C. IN A HEATED COMPRESSION CHAMBER, AND THEN COOLING THE TOW WHILE IT IS STILL IN A COMPRESSED STATE.
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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) | 1970-05-01 | 1970-10-31 | 1971-05-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1974-05-01 | 1974-10-31 | 1975-05-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1978-05-01 | 1978-10-31 | 1979-05-02 | $7700.00 | Window Closed / Lapsed |