US2895288A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Production of bulky colorspun rayon yarn
Assignee: Akzo Nobel UK PLC
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Filing: 1956-09-21
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Granted: 1959-07-21
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Expires: 1976-09-21
Abstract
No abstract record available.
Inventors
- 👤 Yoo Hyungduk
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 20:27
CPC Classifications
D; D02; D02G; D02G1/00; D02G1/02; D02G1/0286
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
61 words
A PROCESS FOR PRODUCING A BULKY YARN FROM A PIGMETAL CELLULOSIC YARN COMPRISING SUPERTWISTING THE PIGMENTED YARN, SETTING THE TWIST THEREIN BY IMPREGNATING THE TWISTED YARN WITH FORMALDEHYDE AT AN ELEVATED TEMPERATURE AND THE PRESENCE OF AN ACIDIC CATALYST, THERMALLY CURRING THE IMPREGNATED YARN, AND THEN DETWISTING THE CELLULOSIC YARN TO PRODUCE A WOOL EFFECT WHICH IS SUBSTANTIALLY FAST TO WASHING.
Claim 2
Dependent Claim
61 words
A PROCESS FOR PRODUCING A BULKY YARN FROM A PIGMETAL CELLULOSIC YARN COMPRISING SUPERTWISTING THE PIGMENTED YARN, SETTING THE TWIST THEREIN BY IMPREGNATING THE TWISTED YARN WITH FORMALDEHYDE AT AN ELEVATED TEMPERATURE AND THE PRESENCE OF AN ACIDIC CATALYST, THERMALLY CURRING THE IMPREGNATED YARN, AND THEN DETWISTING THE CELLULOSIC YARN TO PRODUCE A WOOL EFFECT WHICH IS SUBSTANTIALLY FAST TO WASHING.
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) | 1962-07-20 | 1963-01-19 | 1963-07-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1966-07-20 | 1967-01-19 | 1967-07-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1970-07-20 | 1971-01-19 | 1971-07-21 | $7700.00 | Window Closed / Lapsed |