US3616175A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Chamoislike nonwoven fabric
Assignee: EIDP Inc
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Filing: 1969-06-16
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Granted: 1971-10-26
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Expires: 1989-06-16
Abstract
Abstract Chamoislike nonwoven fabric weighing between 1 and 9 ounces per square yard is produced from a loose web of rayon fibers of up to 1.0 denier per filament maximum by traversing the web with high energy jet streams of water to entangle the fibers and form a strong, durable fabric characterized by a fiber entanglement completeness of at least 0.6 and a fiber entanglement frequency of at least 30 per inch. A substantially nonpatterned appearance is achieved by supporting the web on a fine mesh screen and oscillating the traversing streams. Properties of the fabric are disclosed to be comparable to chamois for wiping water from surfaces.
Inventors
- 👤 Shee Lup Jung
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-31 05:13
CPC Classifications
D; D04; D04H; D04H1/00; D04H1/40; D04H1/44; D04H1/46; D04H1/492; Y; Y10; Y10S; Y10S428/00; Y10S428/904; Y10T; Y10T428/00; Y10T428/24; Y10T428/24355; Y10T428/24438; Y10T428/27; Y10T428/29; Y10T428/2904; Y10T442/00; Y10T442/60; Y10T442/696
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
37 words
The nonwoven fabric defined in claim 1 wherein the fabric weighs from 2 to 5 ounces per square yard and has a bulk of 6 to 13 mils thickness for each ounce per square yard of weight.
Claim 2
Dependent Claim
37 words
The nonwoven fabric defined in claim 1, characterized by a wiping capacity of at least 0.8 gram of water per gram of fabric and a wiping time of 30 to 55 seconds in the standard drum-wiping test.
Claim 3
Dependent Claim
18 words
THe nonwoven fabric defined in claim 1, having a soft, smooth texture with a substantially uniform surface appearance.
Claim 4
Dependent Claim
84 words
A nonapertured, nonwoven fabric having a chamoislike hand and appearance, consisting essentially of rayon staple of about 0.75 denier per filament, weighing from 2 to 4 ounces per square yard, having a bulk of 6 to 13 mils thickness per oz./yd.2 of weight, having a wiping capacity of at least 0.9 gram of water per gram of fabric, having a wiping time of 30 to 55 seconds in the standard drum-wiping test, and having sufficient durability to withstand repeated laundering in a laundry machine.
References Cited (Backward Citations)
No citation records indexed.
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1974-10-25 | 1975-04-26 | 1975-10-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-10-25 | 1979-04-26 | 1979-10-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-10-25 | 1983-04-26 | 1983-10-26 | $7700.00 | Window Closed / Lapsed |