US4364996A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Synthetic fibers having down/feather-like characteristics and suitable for wadding
Assignee: Toyobo Co Ltd
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Filing: 1981-05-28
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Granted: 1982-12-21
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Expires: 2001-05-28
Abstract
Abstract A synthetic fiber for wadding which has a plurality of projections in its cross section and a section deformation ratio (S) of not less than 5000/√D (wherein D is a monofiber denier) and which has the following physical characteristics: Monofiber denier (D, denier): 0.1 to 3; Coefficient of inter-fiber static friction (μ s ): not more than 0.14; Crimp number (CN, number/25 mm): 4 to 14; Ratio of crimp index and crimp number (Ci(%)/CN): 0.6 to 1.8; H 0 .2 (cm): not less than 7.3; H 0 .2 /H 25 (cm/cm): not less than 6.5; δ D (g/cm 2 /cm): not more than 0.4.
Inventors
- 👤 Hiroshige Sugiyama
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 01:04
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/253; D01F; D01F6/00; D01F6/58; D01F6/62; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922; Y10T428/2933; Y10T428/2935; Y10T428/2973; Y10T428/2975; Y10T428/2978
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
104 words
A synthetic fiber for wadding which has a plurality of projections in its cross section and a section deformation ratio (S) of not less than 5000/√D (wherein D is a monofiber denier) and which has the following physical characteristics: Monofiber denier (D, denier): 0.1 to 3; Coefficient of inter-fiber static friction (μ s ): not more than 0.14; Crimp number (CN, number/25 mm): 4 to 14; Ratio of crimp index and crimp number (Ci(%)/CN): 0.6 to 1.8; H 0 .2 (cm): not less than 7.3; H 0 .2 /H 25 (cm/cm): not less than 6.5; δ D (g/cm 2 /cm): not more than 0.4.
Claim 2
Dependent Claim
104 words
A synthetic fiber for wadding which has a plurality of projections in its cross section and a section deformation ratio (S) of not less than 5000/√D (wherein D is a monofiber denier) and which has the following physical characteristics: Monofiber denier (D, denier): 0.1 to 3; Coefficient of inter-fiber static friction (μ s ): not more than 0.14; Crimp number (CN, number/25 mm): 4 to 14; Ratio of crimp index and crimp number (Ci(%)/CN): 0.6 to 1.8; H 0 .2 (cm): not less than 7.3; H 0 .2 /H 25 (cm/cm): not less than 6.5; δ D (g/cm 2 /cm): not more than 0.4.
Claim 3
Dependent Claim
18 words
The synthetic fiber according to claim 1, which has a crimped shape produced by its potential crimping property.
Claim 4
Dependent Claim
23 words
The synthetic fiber according to claim 1, which is made of a polyester comprising repeating units of ethylene terephthalate as the major component.
Claim 5
Dependent Claim
17 words
The synthetic fiber according to claim 1, which has substantially a U-letter shape in its cross section.
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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) | 1985-12-20 | 1986-06-21 | 1986-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-12-20 | 1990-06-21 | 1990-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-12-20 | 1994-06-21 | 1994-12-21 | $7700.00 | Window Closed / Lapsed |