US4039711A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Non-woven fabrics
Assignee: Fiber Technology Corp
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Filing: 1973-05-21
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Granted: 1977-08-02
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Expires: 1993-05-21
Abstract
Abstract Thin nonwoven fabrics of high resistance to elongation are produced by bonding fibrous webs comprising staple thermoplastic fibers to each face of a spun-bonded web of entangled and interlaced continuous filaments, wherein substantially all of the filaments of the spun-bonded web are in bonding contact with the thermoplastic fibers of the fibrous webs.
Inventors
- 👤 Nicholas S. Newman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:36
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; B32B5/02; B32B5/022; D; D04; D04H; D04H5/00; D04H5/06; B32B2262/00; B32B2262/02; B32B2262/0276; B32B2307/00; B32B2307/70; B32B2307/718; B32B2309/00; B32B2309/08; B32B2309/10; B32B2309/105; Y; Y10; Y10T; Y10T442/00; Y10T442/50; Y10T442/56; Y10T442/60; Y10T442/659; Y10T442/66; Y10T442/681
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
94 words
A thin nonwoven laminate of high resistance to elongation which comprises: a spun-bonded web of entangled and interlaced synthetic polymeric continuous filaments, said spun-bonded web being a lightly bonded network of filaments weighing not over 30 grams per square yard and being not more than 10 mils in thickness; and, a fleece of textile-length staple fibers consisting of thermoplastic and non-thermoplastic fibers being disposed on each face of said spun-bonded web, substantially all of the filaments of said spun-bonded web being bonded to and in bonding contact with said thermoplastic fibers of said fleece.
Claim 2
Dependent Claim
94 words
A thin nonwoven laminate of high resistance to elongation which comprises: a spun-bonded web of entangled and interlaced synthetic polymeric continuous filaments, said spun-bonded web being a lightly bonded network of filaments weighing not over 30 grams per square yard and being not more than 10 mils in thickness; and, a fleece of textile-length staple fibers consisting of thermoplastic and non-thermoplastic fibers being disposed on each face of said spun-bonded web, substantially all of the filaments of said spun-bonded web being bonded to and in bonding contact with said thermoplastic fibers of said fleece.
Claim 3
Dependent Claim
13 words
The nonwoven laminate of claim 1 wherein said continuous filaments are polyester filaments.
Claim 4
Dependent Claim
28 words
The nonwoven laminate of claim 2 wherein said fleece of textile-length fibers comprises intermingled drawn and undrawn polyester fibers, said undrawn polyester fibers serving as bonding thermoplastic fibers.
Claim 5
Dependent Claim
26 words
The nonwoven laminate of claim 3 wherein said fleece of textile-length fibers comprises 40% - 60% undrawn polyester fibers and 60% - 40% drawn polyester fibers.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-08-01 | 1981-01-31 | 1981-08-02 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-08-01 | 1985-01-31 | 1985-08-02 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-08-01 | 1989-01-31 | 1989-08-02 | $7700.00 | Window Closed / Lapsed |