US3114192A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Process for producing non-pilling polyamide fibers
Assignee: EIDP Inc
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Filing: 1962-03-06
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Granted: 1963-12-17
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Expires: 1982-03-06
Abstract
No abstract record available.
Inventors
- 👤 Otto J Matray
- 👤 Jr William H Stine
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:05
CPC Classifications
D; D06; D06M; D06M11/00; D06M11/32; D06M11/50; D02; D02G; D02G1/00; D02G1/12; D02G1/127; D03; D03D; D03D27/00; Y; Y10; Y10S; Y10S8/00; Y10S8/21
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
63 words
IN THE PRODUCTION OF POLYAMIDE YARN, THE STEPS OF: CRIMPING A FILAMENT; TREATING THE CRIMPED FILAMENT IN AN AQUEOUS SOLUTION OF AN OXIDIZING AGENT; AND REMOVING EXCESS SOLUTION FROM THE TREATED FILAMENT, THE TIME-CONCENTRATION RELATIONSHIP OF THE TREATING STEP BEING SUFFICIENT TO PRODUCE WEAK SPOTS IN THE LENGTH OF THE FILAMENT AND TO REDUCE ITS LOOP TOUGHNESS TO A AVALUE OF FROM 2-27.
Claim 2
Dependent Claim
63 words
IN THE PRODUCTION OF POLYAMIDE YARN, THE STEPS OF: CRIMPING A FILAMENT; TREATING THE CRIMPED FILAMENT IN AN AQUEOUS SOLUTION OF AN OXIDIZING AGENT; AND REMOVING EXCESS SOLUTION FROM THE TREATED FILAMENT, THE TIME-CONCENTRATION RELATIONSHIP OF THE TREATING STEP BEING SUFFICIENT TO PRODUCE WEAK SPOTS IN THE LENGTH OF THE FILAMENT AND TO REDUCE ITS LOOP TOUGHNESS TO A AVALUE OF FROM 2-27.
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) | 1966-12-16 | 1967-06-17 | 1967-12-17 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1970-12-16 | 1971-06-17 | 1971-12-17 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1974-12-16 | 1975-06-17 | 1975-12-17 | $7700.00 | Window Closed / Lapsed |