Patent US4770938A successfully refreshed from Google Patents.
US4770938A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Hollow trilobal cross-section filament
Assignee: Honeywell International Inc
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Filing: 1986-09-29
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Granted: 1988-09-13
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Expires: 2006-09-29
Abstract
Abstract This invention is a trilobal, synthetic fiber, intended for use in carpets, having an axially extending hole in each lobe, the total cross-sectional area of the fiber being about 5 to 12 percent void, said fiber cross-section having a modification ratio of between about 2 to 3, and an arm angle of about 15° to 45°, so that a fiber having improved bulk, soil hiding and resiliency is apparent in a carpet having face fiber of said fiber.
Inventors
- 👤 Weldon H. Peterson
- 👤 Kenneth G. Morrison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 10:40
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/24; D01D5/253; D01F; D01F6/00; D01F6/58; D01F6/60; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T428/2969; Y10T428/2973; Y10T428/2975
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
81 words
A trilobal nylon, synthetic fiber, intended for use in carpets, having an axially extending hole in each lobe, having no central axial hole the total cross-sectional area of the fiber being about 5 to 12 percent void, said fiber cross-section having a modification ratio of between about 2 to 3, and an arm angle of about 15° to 45°, so that a fiber having improved bulk, soil hiding and resiliency is apparent in a carpet having face fiber of said fiber.
Claim 2
Dependent Claim
81 words
A trilobal nylon, synthetic fiber, intended for use in carpets, having an axially extending hole in each lobe, having no central axial hole the total cross-sectional area of the fiber being about 5 to 12 percent void, said fiber cross-section having a modification ratio of between about 2 to 3, and an arm angle of about 15° to 45°, so that a fiber having improved bulk, soil hiding and resiliency is apparent in a carpet having face fiber of said fiber.
Claim 3
Dependent Claim
11 words
The fiber of claim 1 wherein the nylon is nylon 6.
Claim 4
Dependent Claim
11 words
The fiber of claim 1 wherein the nylon is nylon 6,6.
Claim 5
Dependent Claim
15 words
The fiber of claim 1 wherein said modification ratio is between about 2.2 and 2.8.
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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) | 1991-09-13 | 1992-03-14 | 1992-09-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-13 | 1996-03-14 | 1996-09-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-13 | 2000-03-14 | 2000-09-13 | $7700.00 | Window Closed / Lapsed |