Patent US4091022A successfully refreshed from Google Patents.
US4091022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyamide fiber
Assignee: EIDP Inc
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Filing: 1977-05-25
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Granted: 1978-05-23
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Expires: 1997-05-25
Abstract
Abstract A conductive fibre having soil-hiding properties and good dye light fastness properties comprising a fibre-forming polyamide having an additive dispersed therein as a separate phase, the additive being derived from a boric acid and a poly(oxyalkylene) material of average molecular weight at least 600. The soil-hiding properties are produced on scouring the fibre.
Inventors
- 👤 Sylvia Etchells
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-28 22:10
CPC Classifications
D; D01; D01F; D01F6/00; D01F6/88; D01F6/90; C; C08; C08G; C08G65/00; C08G65/02; C08G65/32; C08G65/321; C08G65/324; C08K; C08K3/00; C08K3/38; C08K5/00; C08K5/55; D01F1/00; D01F1/02; D01F1/10
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
45 words
A conductive fibre comprising a fibre-forming polyamide having dispersed therein as a separate phase between 1% and 14% by weight inclusive of an additive which is derived from a boric acid and a polyoxyalkylene glycol of average molecular weight in the range up to 30,000.
Claim 2
Dependent Claim
45 words
A conductive fibre comprising a fibre-forming polyamide having dispersed therein as a separate phase between 1% and 14% by weight inclusive of an additive which is derived from a boric acid and a polyoxyalkylene glycol of average molecular weight in the range up to 30,000.
Claim 3
Dependent Claim
15 words
A fibre according to claim 1 in which the polyoxyalkylene material is a polyoxyethylene glycol.
Claim 4
Dependent Claim
13 words
A fibre according to claim 1 in which said fibre contains internal voids.
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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) | 1981-05-22 | 1981-11-21 | 1982-05-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1985-05-22 | 1985-11-21 | 1986-05-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1989-05-22 | 1989-11-21 | 1990-05-23 | $7700.00 | Window Closed / Lapsed |