US3816231A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Reinforced nonwoven fabrics
Assignee: Fiber Technology Corp
•
Filing: 1972-05-25
•
Granted: 1974-06-11
•
Expires: 1992-05-25
Abstract
Abstract Textile-length fibers are subjected to a centrifugal force which orients them in a lateral direction, in which orientation they are deposited upon and mechanically engaged with a set of spacedapart warp strands to form novel nonwoven fabrics.
Inventors
- 👤 P Marshall
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 06:20
CPC Classifications
D; D04; D04H; D04H5/00; D04H5/08; Y; Y10; Y10T; Y10T442/00; Y10T442/60; Y10T442/643; Y10T442/646; Y10T442/659; Y10T442/666; Y10T442/682; Y10T442/684; Y10T442/686
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
35 words
The product according to claim 1 in which at least a portion of the textile-length fibers are bonded to each other by a bonding material located principally at the points of intersection of said fibers.
Claim 2
Dependent Claim
15 words
The product according to claim 2 in which the bonding material is a thermoplastic powder.
Claim 3
Dependent Claim
15 words
The product according to claim 2 in which the bonding material is a thermoplastic fiber.
Claim 4
Dependent Claim
138 words
A nonwoven laminate which comprises a set of parallel spaced-apart warp strands extending continuously in the longitudinal or machine direction of the laminate, said set of warp strands having superimposed thereon a web of textile-length fibers, said web of textile length fibers having a principal orientation substantially normal to said set of warp strands, a portion of the fibers in said web being mechanically engaged with said parallel warp strands by passing over certain of said strands and under other of said strands, an additional portion of the fibers in said web being mechanically engaged with said parallel warp strands by having a portion of their length wrapped around at least a portion of the perimeters of certain of said strands, and a sheet material being adhesively united to said warp strands and said web of textile-length fibers.
Claim 5
Dependent Claim
17 words
The product according to claim 5 in which said sheet material is a sheet of cellulose tissue.
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) | 1977-06-10 | 1977-12-10 | 1978-06-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1981-06-10 | 1981-12-10 | 1982-06-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1985-06-10 | 1985-12-10 | 1986-06-11 | $7700.00 | Window Closed / Lapsed |