Patent US4492731A successfully refreshed from Google Patents.
US4492731A
Expired / Lapsed
US
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Trilobal filaments exhibiting high bulk and sparkle
Assignee: EIDP Inc
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Filing: 1982-11-22
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Granted: 1985-01-08
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Expires: 2002-11-22
Abstract
Abstract Trilobal synthetic carpet filaments in a specified range of modification ratios and related arm angles exhibit a unique combination of high bulk and high sparkle.
Inventors
- 👤 Vilas G. Bankar
- 👤 Terry L. Stuchlik
- 👤 Frank Werny
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 12:36
CPC Classifications
D; D01; D01D; D01D5/00; D01D5/22; D01D5/253; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T428/2909; Y10T428/2913; Y10T428/2922; Y10T428/2973
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
60 words
Trilobal synthetic polymer filaments for carpet yarn having high bulk and high sparkle, said filaments having a cross-section consisting of three substantially equi-spaced, integrally joined arms of substantially similar shape and size, said cross-section having a modification ratio and arm angle within the range represented by the area enclosed by sides A,B,C, and D on FIG. 2 of the drawing.
Claim 2
Dependent Claim
60 words
Trilobal synthetic polymer filaments for carpet yarn having high bulk and high sparkle, said filaments having a cross-section consisting of three substantially equi-spaced, integrally joined arms of substantially similar shape and size, said cross-section having a modification ratio and arm angle within the range represented by the area enclosed by sides A,B,C, and D on FIG. 2 of the drawing.
Claim 3
Dependent Claim
12 words
The filaments of claim 1 wherein the synthetic polymer is nylon 6,6.
Claim 4
Dependent Claim
10 words
Crimped continuous filament yarn of the filaments of claim 1.
Claim 5
Dependent Claim
10 words
Crimped staple fiber yarn of the filaments of claim 1.
References Cited (Backward Citations)
CA752770A
Cited
US2939201A
Cited
US3097416A
Cited
GB938768A
Cited
US3508390A
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US3971202A
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US3994122A
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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) | 1988-01-08 | 1988-07-09 | 1989-01-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-01-08 | 1992-07-09 | 1993-01-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-01-08 | 1996-07-09 | 1997-01-08 | $7700.00 | Window Closed / Lapsed |