Patent US4297413A successfully refreshed from Google Patents.
US4297413A
Expired / Lapsed
US
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Concentric composite conjugate yarns and a process for manufacturing same
Assignee: Kureha Corp
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Filing: 1980-04-23
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Granted: 1981-10-27
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Expires: 2000-04-23
Abstract
Abstract The invention resides in a strong conjugate composite yarn highly adapted for use as a fishing line. The core material is a polyolefin having double refrax Δn amounting to at least 30×10 -3 . The sheath material is a polyamide or a polyester. The both core and sheath components are highly stretched and oriented.
Inventors
- 👤 Tohru Sasaki
- 👤 Hiroyuki Endoh
- 👤 Hiroshi Ohhira
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 11:46
CPC Classifications
D; D01; D01F; D01F8/00; D01F8/04; D01F8/06; A; A01; A01K; A01K91/00; D02; D02G; D02G3/00; D02G3/22; D02G3/36; D02G3/44; D02G3/444; D10; D10B; D10B2321/00; D10B2321/02; D10B2331/00; D10B2331/02; D10B2331/04; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2929; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
73 words
A concentric stretched conjugated yarn having (A) A polyolefin core component which is initially prestretched to have a double refraction index of from 10×25 -3 to 25×10 -3 , and (B) A concentric sheath component which is a polyamide or polyester fused resin and which is initially unoriented, with the proviso that the conjugated yarn is stretched until the double refraction index of the polyolefin core component is at least 30×10 -3 .
Claim 2
Dependent Claim
73 words
A concentric stretched conjugated yarn having (A) A polyolefin core component which is initially prestretched to have a double refraction index of from 10×25 -3 to 25×10 -3 , and (B) A concentric sheath component which is a polyamide or polyester fused resin and which is initially unoriented, with the proviso that the conjugated yarn is stretched until the double refraction index of the polyolefin core component is at least 30×10 -3 .
Claim 3
Dependent Claim
18 words
The conjugated yarn of claim 1, wherein the crystalline resin sheath component is a polyamide or a polyester.
Claim 4
Dependent Claim
23 words
The conjugated yarn of claim 2, wherein the double refraction index of the polyolefin core component is not more than 40×10 -3 .
Claim 5
Dependent Claim
31 words
The conjugated yarn of claim 2, wherein the crystalline resin sheath component is a polyamide whose double refraction index after stretching is from about 40×10 -3 to about 60×10 -3 .
Claim 6
Dependent Claim
31 words
The conjugated yarn to claim 2, wherein the crystalline resin sheath component is a polyester whose double refraction index after stretching is from about 230×10 -3 to about 300×10 -3 .
Claim 7
Dependent Claim
15 words
The conjugated yarn of claim 2, wherein the polyolefin core component is polypropylene or polyethylene.
Claim 8
Dependent Claim
12 words
The conjugated yarn of claim 4, wherein the polyamide is nylon 6.
Claim 9
Dependent Claim
18 words
The conjugated yarn of claim 6, wherein there is an adhesive layer between the core and the sheath.
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) | 1984-10-26 | 1985-04-27 | 1985-10-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-10-26 | 1989-04-27 | 1989-10-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-10-26 | 1993-04-27 | 1993-10-27 | $7700.00 | Window Closed / Lapsed |