US4335185A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Indigo-dyeable polyester fibers
Assignee: EIDP Inc
•
Filing: 1980-12-29
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Granted: 1982-06-15
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Expires: 2000-12-29
Abstract
Abstract Cross-linked polyvinyl alcohol coated polyester fiber is indigo-dyeable and exhibits wash-down and crocking resistance characteristics similar to indigo-dyed cotton fibers.
Inventors
- 👤 Robert L. Adelman
- 👤 John J. P. Turner
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 15:08
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/21; D06M15/327; D06M15/333; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2907; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
32 words
Indigo-dyeable polyester fiber comprising polyester fiber coated with the cross-linked product of polyvinyl alcohol and a water-soluble polyamide containing secondary amino groups in the polymer chain which have been reacted with epichlorohydrin.
Claim 2
Dependent Claim
32 words
Indigo-dyeable polyester fiber comprising polyester fiber coated with the cross-linked product of polyvinyl alcohol and a water-soluble polyamide containing secondary amino groups in the polymer chain which have been reacted with epichlorohydrin.
Claim 3
Dependent Claim
40 words
The fiber of claim 1 wherein the ratio of polyvinyl alcohol to water-soluble polyamide is in the range of between 80/20 and 95/5 wt. ratio and the cross-linked coating constitutes between about 0.25 and 2% by weight of the fiber.
Claim 4
Dependent Claim
16 words
The fiber of claim 2 wherein the coating additionally contains a blue dye and carbon black.
Claim 5
Dependent Claim
13 words
A loose batt of staple fiber from the coated fiber of claim 1.
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) | 1985-06-14 | 1985-12-14 | 1986-06-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-06-14 | 1989-12-14 | 1990-06-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-06-14 | 1993-12-14 | 1994-06-15 | $7700.00 | Window Closed / Lapsed |