Patent US3620903A successfully refreshed from Google Patents.
US3620903A
Expired / Lapsed
US
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Lightweight nonpatterned nonwoven fabric
Assignee: EIDP Inc
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Filing: 1970-01-29
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Granted: 1971-11-16
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Expires: 1990-01-29
Abstract
Abstract Lightweight, nonpatterned, nonwoven fabrics suitable for use as wearing apparel are produced by treating fibrous sheet materials with fine, essentially columnar streams of liquid jetted from orifices under high pressure. A layer of fibrous material is supported on a nonpatterning surface and traversed with the streams to entangle the fibers in a manner which imparts strength and stability without the need for binder. A smooth fabric surface is provided by use of broken streams or by rapid oscillation of the streams.
Inventors
- 👤 William Wallar Bunting Jr
- 👤 Franklin James Evans
- 👤 David Ellis Hook
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-02 16:18
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/425; D04H1/44; D04H1/46; D04H1/492; Y; Y10; Y10T; Y10T428/00; Y10T428/29; Y10T428/2904; Y10T442/00; Y10T442/60; Y10T442/697
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
32 words
A nonwoven fabric as specified in claim 1 wherein said textile fibers have a denier per filament of about 0.5 to 3 and an average length of about 0.5 to 2 inches.
Claim 2
Dependent Claim
17 words
A nonwoven fabric as specified in claim 1 and weighing 0.5 to 1.5 ounces per square yard.
Claim 3
Dependent Claim
16 words
A nonwoven fabric as specified in claim 1 wherein said entanglement frequency is at least 14.
Claim 4
Dependent Claim
19 words
A nonwoven fabric as specified in claim 1 and having an internal bond value of at least 0.2 foot-pounds.
References Cited (Backward Citations)
US3493462A
Cited
US3485706A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-11-15 | 1975-05-17 | 1975-11-16 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-11-15 | 1979-05-17 | 1979-11-16 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-11-15 | 1983-05-17 | 1983-11-16 | $7700.00 | Window Closed / Lapsed |