Patent US3086252A successfully refreshed from Google Patents.
US3086252A
Expired / Lapsed
US
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Method of producing staple fibers
Assignee: Akzo Nobel UK PLC
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Filing: 1961-08-22
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Granted: 1963-04-23
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Expires: 1981-08-22
Abstract
No abstract record available.
Inventors
- 👤 Robert G Marley
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 02:26
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/04; D01G; D01G1/00; D01G1/02; D01G1/04; D02; D02J; D02J1/00; D02J1/22; D02J1/228
Claims Analysis
Total Claims: 1
Claim 1
Independent Claim
103 words
A METHOD FOR PRODUCING STAPLE FIGERS INCLUDING THE STEPS OF FORMING A TOW COMPRISED OF A PLURALITY OF FILAMENTS OF VINYL CHLORIDE COPOLYMERS, STRETCHING THE TOW TO EFFECT AT LEAST PARTIAL MOLECULAR ORIENTATION WITHIN THE FILAMENTS THEREOF, RELAXING THE STRETCHED TOW TO RELIEVE THE FILAMENTS OF UNEVEN INTERNAL STRAINS WHICH MAY DEVELOP THEREIN DURING THE FORMATION THEREOF, SAID FILAMENTS BEING SUBJECTED AT MOST TO SUCH TENSION AS MAY BE INDUCED BY THE WEIGHT OF THE FILAMENTS THEMSELVES DURING THE RELAXATION THEREOF, STRETCHING THE TOW AFTER RELAXATION THEREOF TO EFFECT FURTHER MOLECULAR ORIENTATION WITHIN THE FILAMENTS, AND MAINTAINING THE TOW OF FILAMENTS UNDER TENSION
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) | 1966-04-22 | 1966-10-22 | 1967-04-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-04-22 | 1970-10-22 | 1971-04-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-04-22 | 1974-10-22 | 1975-04-23 | $7700.00 | Window Closed / Lapsed |