US3629047A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Nonwoven fabric
Assignee: Hercules LLC
•
Filing: 1970-02-02
•
Granted: 1971-12-21
•
Expires: 1990-02-02
Abstract
Abstract Disclosed is a nonwoven fabric having high-strength properties. The nonwoven fabric is comprised of a nonwoven scrim sandwiched between at least two outer layers of nonwoven staple fibers such as cellulosic fibers. The outer layers are adhesively bonded to one another through openings in the scrim. The scrim is comprised of at least two webs, each web being comprised of a plurality of essentially parallel, continuous monofilament strands of a synthetic hydrophobic polymer. The strands of the scrim are either unbonded or only lightly bonded to one another and to the outer layers whereby they have a substantial degree of movement when stress is applied.
Inventors
- 👤 Robert W Davison
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 21:55
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/02; B32B5/08; A; A47; A47G; A47G9/00; A47G9/02; A47G9/0238; B32B27/00; B32B27/02; B32B27/06; B32B27/12; B32B27/32; B32B5/022; B32B5/028; B32B5/12; B32B5/22; B32B5/24; B32B5/26; B32B7/00; B32B7/04; B32B7/12; B32B9/00; B32B9/02; B32B9/04; D; D04; D04H; D04H5/00; D04H5/04; B32B2262/00; B32B2262/02; B32B2262/0253; B32B2262/06; B32B2262/062; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24058; Y10T428/24074; Y10T428/24091; Y10T428/24099; Y10T428/24802; Y10T428/24826; Y10T442/00; Y10T442/10; Y10T442/184; Y10T442/197
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
35 words
The nonwoven fabric of claim 1 when the strands of one of the webs of the scrim make an angle of between about 45* and 90* with the strands of at least one other web.
Claim 2
Dependent Claim
18 words
The nonwoven fabric of claim 2 wherein at least one outer ply is comprised of staple cellulosic fibers.
Claim 3
Dependent Claim
13 words
The nonwoven fabric of claim 3 wherein the cellulosic fibers are cotton fibers.
Claim 4
Dependent Claim
13 words
The nonwoven fabric of claim 3 wherein the cellulosic fibers are woodpulp fibers.
Claim 5
Dependent Claim
14 words
The nonwoven fabric of claim 3 wherein the cellulosic fibers are regenerated cellulose fibers.
Claim 6
Dependent Claim
30 words
The nonwoven fabric of claim 2 wherein at least one of the webs of which the scrim is comprised is a fibrillated striated film of a synthetic thermoplastic hydrophobic material.
Claim 7
Dependent Claim
17 words
The nonwoven fabric of claim 7 wherein the synthetic thermoplastic hydrophobic material is a polymer of propylene.
Claim 8
Dependent Claim
69 words
The nonwoven fabric of claim 2 wherein the outer layers are bonded together by a flexible polymeric adhesive having a tensile strength at rupture of at least about 100 p.s.i., an elongation at rupture of at least about 400 percent, an initial modulus of less than about 200 p.s.i. per 100 percent elongation, and an average modulus of a value not greater than 800 p.s.i. per 100 percent elongation.
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) | 1974-12-20 | 1975-06-21 | 1975-12-21 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1978-12-20 | 1979-06-21 | 1979-12-21 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1982-12-20 | 1983-06-21 | 1983-12-21 | $7700.00 | Window Closed / Lapsed |