US4520066A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Polyester fibrefill blend
Assignee: Imperial Chemical Industries Ltd
•
Filing: 1983-01-14
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Granted: 1985-05-28
•
Expires: 2003-01-14
Abstract
Abstract A fibrefill blend comprising, and a bonded batt formed from, (a) from 90 to 50% by weight of slickened crimped hollow polyester fibre having a cavity volume of 10 to 30% and, complementally, to total 100% conjugate fibre, the hollow polyester fibres and the conjugate binding fibres having substantially the same density and decitex (and so diameter).
Inventors
- 👤 Graham Athey
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 15:50
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/50; B; B68; B68G; B68G11/00; B68G11/02; B68G11/03; D04H1/42; D04H1/4209; D04H1/4282; D04H1/4291; D04H1/4326; D04H1/435; D04H1/4382; D04H1/43825; D04H1/43828; D04H1/43835; D04H1/4391; D04H1/43914; D04H1/43918; D04H1/54; D04H1/541; D04H1/5412; D04H1/5418; D04H1/542; D04H1/544; D04H1/55; D04H1/70; D04H1/74; D04H1/43832; Y; Y10; Y10T; Y10T428/00; Y10T428/249921; Y10T428/249953; Y10T428/249982; Y10T428/249985; Y10T428/29; Y10T428/2904; Y10T428/2905; Y10T428/2909; Y10T428/2913; Y10T428/2922; Y10T428/2924; Y10T442/00; Y10T442/60; Y10T442/608; Y10T442/609; Y10T442/612
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
80 words
A fibrefill blend comprising (a) from 90 to 50% by weight of slickened crimped hollow polyester fibre having a cavity volume of 10 to 30% and, complementally, to total 100% by weight, (b) from 10 to 50% by weight of slickened crimped conjugate fibre, the improvement being that the hollow polyester fibres and the conjugate binding fibres have substantially the same density and decitex (and so diameter) and that the conjugate fibre comprises a polyester core and a polyolefin sheath.
Claim 2
Dependent Claim
80 words
A fibrefill blend comprising (a) from 90 to 50% by weight of slickened crimped hollow polyester fibre having a cavity volume of 10 to 30% and, complementally, to total 100% by weight, (b) from 10 to 50% by weight of slickened crimped conjugate fibre, the improvement being that the hollow polyester fibres and the conjugate binding fibres have substantially the same density and decitex (and so diameter) and that the conjugate fibre comprises a polyester core and a polyolefin sheath.
Claim 3
Dependent Claim
12 words
A thermally bonded batt formed from the fibrefill blend of claim 1.
References Cited (Backward Citations)
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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) | 1988-05-27 | 1988-11-26 | 1989-05-28 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-27 | 1992-11-26 | 1993-05-28 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-27 | 1996-11-26 | 1997-05-28 | $7700.00 | Window Closed / Lapsed |