US3867935A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Plied absorbent structures
Assignee: Johnson and Johnson
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Filing: 1973-05-14
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Granted: 1975-02-25
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Expires: 1993-05-14
Abstract
Abstract A surgical dressing is provided comprising a plurality of plies of a textile-like nonwoven fabric of unbonded, mechanically entangled fibers. The dressing exhibits an absorption capacity per gram of total fabric at least equal to the absorption capacity per gram of a single ply of said fabric and additionally, exhibits an unusually low propensity to lint.
Inventors
- 👤 Norman R Eisdorfer
- 👤 John M Lesniak
- 👤 Bernard M Lichstein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 23:15
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/44; A61F13/01; A61F13/01034; A61F13/01042; A61F2013/00361; A61F2013/00544; A61F2013/00604; A61F2013/00727; A61F2013/00731; A61F2013/00744
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
91 words
A surgical dressing comprising a plurality of plies of a textile-like nonwoven fabric of essentially unbonded, mechanically entangled fibers randomly entangled with each other in a pattern of localized entangled regions interconnected by fibers extending between adjacent entangled regions, said fabric having a Tensile Energy Absorption value of at least 1.0 foot pounds per foot square, in both the machine and cross directions and said dressing having an absorption capacity per gram of total fabric at least equal to the absorption capacity per gram of a single ply of said fabric.
Claim 2
Dependent Claim
91 words
A surgical dressing comprising a plurality of plies of a textile-like nonwoven fabric of essentially unbonded, mechanically entangled fibers randomly entangled with each other in a pattern of localized entangled regions interconnected by fibers extending between adjacent entangled regions, said fabric having a Tensile Energy Absorption value of at least 1.0 foot pounds per foot square, in both the machine and cross directions and said dressing having an absorption capacity per gram of total fabric at least equal to the absorption capacity per gram of a single ply of said fabric.
Claim 3
Dependent Claim
25 words
The surgical dressing of claim 1 having a degree of linting of less than 0.008 mg. of particulate material per inch square of exposed area.
Claim 4
Dependent Claim
27 words
The surgical dressing of claim 1 wherein each ply has a weight ranging from about 0.75 ounces per yard square to about 3.0 ounces per yard square.
Claim 5
Dependent Claim
25 words
The surgical dressing of claim 1 wherein the Tensile Energy Absorption value is at least about 2.0 ft.-lbs./ft.2 in both the machine and cross directions.
Claim 6
Dependent Claim
28 words
The surgical dressing of claim 1 provided with a plurality of thermoplastic grids interlayered between said plurality of plies of fabric thereby providing said dressing with wet resilience.
Claim 7
Dependent Claim
12 words
The surgical dressing of claim 5 wherein said grids comprise a polyolefin.
Claim 8
Dependent Claim
16 words
The surgical dressing of claim 5 wherein said interlayers are heat-sealed together at their marginal portions.
Claim 9
Dependent Claim
20 words
The surgical dressing of claim 7 wherein said interlayers are further heat-sealed together at points inward of said marginal portion.
References Cited (Backward Citations)
US2897108A
Cited
US3683921A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1978-02-24 | 1978-08-26 | 1979-02-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-02-24 | 1982-08-26 | 1983-02-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-02-24 | 1986-08-26 | 1987-02-25 | $7700.00 | Window Closed / Lapsed |