US3837022A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Fibers for pillow stuffing
Assignee: Phillips Petroleum Co
•
Filing: 1973-03-30
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Granted: 1974-09-24
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Expires: 1993-03-30
Abstract
Abstract Synthetic staple fibers having improved resilience, softness and non-scroopiness and which are suitable for use as bed pillow stuffing, are produced by melt spinning filaments from a blend of fiber-forming polymer of propylene and at least one wax compound having the formula WHEREIN X AND Z ARE INTEGERS IN THE RANGE OF 10 TO 25 AND Y IS AN INTEGER IN THE RANGE OF 2 TO 10, DRAWING, HEATING AND CRIMPING THE RESULTING FILAMENTS AND CUTTING THE CRIMPED FILAMENTS INTO STAPLE FIBERS, THE FILAMENTS BEING COATED WITH AN ETHOXYLATED POLYSILOXANE.
Inventors
- 👤 P Moore
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:43
CPC Classifications
D; D06; D06M; D06M15/00; D06M15/19; D06M15/37; D06M15/643; D06M15/647; B; B68; B68G; B68G1/00; D01; D01F; D01F1/00; D01F1/02; D01F1/10; D01F6/00; D01F6/02; D01F6/04; D01F6/06; D01F6/28; D01F6/30; Y; Y10; Y10S; Y10S5/00; Y10S5/948; Y10S5/952; Y10T; Y10T428/00; Y10T428/29; Y10T428/2913; Y10T428/2922
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
58 words
A method in accordance with claim 1 wherein said wax compound is present in said blend in an amount to provide from about 0.1 to about 3 weight percent of the filaments, wherein said ethoxylated polysiloxane is present on said filaments in an amount in the range of about 0.02 to about 1 weight percent of the filament.
Claim 2
Dependent Claim
21 words
A method in accordance with claim 2 wherein said ethoxylated polysiloxane is applied to the filaments after solidification and before drawing.
Claim 3
Dependent Claim
38 words
A method in accordance with claim 3 whereiN the step of heating the filaments to cause a portion of the wax component to migrate to the surface of the filaments is accomplished during the crimping of the filaments.
Claim 4
Dependent Claim
45 words
A method in accordance with claim 4 wherein the step of heating the filaments comprises heating the filaments to a temperature in the range of about 220*F to about 350*F for a period of time in the range of about 1 to about 20 seconds.
Claim 5
Dependent Claim
12 words
A method in accordance with claim 5 wherein each R is methyl.
Claim 6
Dependent Claim
26 words
A method in accordance with claim 6 wherein said ethoxylated polysiloxane has a viscosity in the range of about 150 to about 250 centistokes at 77*F.
Claim 7
Dependent Claim
58 words
A method in accordance with claim 7 wherein said wax compound is present in said blend in an amount to provide from about 0.5 to about 2 weight percent of the filaments, wherein said ethoxylated polysiloxane is present on said filaments in an amount in the range of about 0.05 to about 0.5 weight percent of the filament.
Claim 8
Dependent Claim
13 words
A method in accordance with claim 8 wherein said wax compound is N,N''-ethylenebis(stearamide).
Claim 9
Dependent Claim
19 words
A method in accordance with claim 1 wherein said wax compound is N,N''-ethylenebis(stearamide), and wherein each R is methyl.
Claim 10
Dependent Claim
16 words
A pillow comprising a casing stuffed with staple fibers prepared by the method of claim 1.
Claim 11
Dependent Claim
24 words
A synthetic staple fiber having improved resilience, softness, and non-scroopiness, suitable for use as bed pillow stuffing, prepared by the method of claim 1.
References Cited (Backward Citations)
US3303150A
Cited
US3423235A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1977-09-23 | 1978-03-25 | 1978-09-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-09-23 | 1982-03-25 | 1982-09-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-09-23 | 1986-03-25 | 1986-09-24 | $7700.00 | Window Closed / Lapsed |