Patent US4444639A successfully refreshed from Google Patents.
Patent US4820577A successfully refreshed from Google Patents.
US4820577A
Expired / Lapsed
US
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Meltblown superabsorbent thermoplastic compositions
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1986-12-22
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Granted: 1989-04-11
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Expires: 2006-12-22
Abstract
Abstract A nonwoven superabsorbent web comprising fibers composed of a superabsorbent, thermoplastic polymeric composition, such as a nonwoven superabsorbent web comprising a plurality of substantially randomly deposited monofilaments of a thermoplastic superabsorbent. Such a web is prepared by meltblowing a thermoplastic superabsorbent.
Inventors
- 👤 Michael T. Morman
- 👤 Sharon L. Greene
- 👤 Jose F. Pazos
- 👤 Augusto Rodriguez
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-30 16:58
CPC Classifications
C; C08; C08G; C08G18/00; C08G18/06; C08G18/08; C08G18/10; A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; C08G18/28; C08G18/40; C08G18/48; C08G18/4833; C08G81/00; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4326; D04H1/4358; D04H1/54; D04H1/56; A61F13/20; A61F13/2002; A61F13/202; A61F2013/530131; A61F2013/530481; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10S428/913; Y10T; Y10T428/00; Y10T428/25; Y10T428/253; Y10T428/29; Y10T428/2913; Y10T428/2933; Y10T428/2964; Y10T428/2967; Y10T442/00; Y10T442/60; Y10T442/68; Y10T442/69
Claims Analysis
Total Claims: 11
Claim 1
Independent Claim
14 words
A superabsorbent meltblown nonwoven web comprising fibers composed of a superabsorbent, thermoplastic polymeric composition.
Claim 2
Dependent Claim
14 words
A superabsorbent meltblown nonwoven web comprising fibers composed of a superabsorbent, thermoplastic polymeric composition.
Claim 3
Dependent Claim
23 words
A superabsorbent nonwoven web comprising a plurality of substantially identically prepared discontinuous and substantially randomly deposited monofilaments of a superabsorbent, thermoplastic polymeric composition.
Claim 4
Dependent Claim
23 words
A superabsorbent nonwoven web comprising a plurality of substantially identically prepared discontinuous and substantially randomly deposited monofilaments of a superabsorbent, thermoplastic polymeric composition.
Claim 5
Dependent Claim
12 words
The web of claim 2, in which said composition is a polyurethane.
Claim 6
Dependent Claim
23 words
A superabsorbent nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randumly deposited monofilaments of a superabsorbent, thermoplastic polymeric composition.
Claim 7
Dependent Claim
23 words
A superabsorbent nonwoven web comprising a plurality of substantially identically prepared continuous and substantially randumly deposited monofilaments of a superabsorbent, thermoplastic polymeric composition.
Claim 8
Dependent Claim
12 words
The web of claim 4, in which said composition is a polyurethane.
Claim 9
Dependent Claim
98 words
A nonwoven web comprising a matrix of meltblown thermoplastic polymeric fibers and a multiplicity of individualized fibers disposed throughout said matrix and engaging at least some of the matrix fibers to space said matrix fibers apart from each other, said individualized fibers being interconnected by and held captive within said matrix by mechanical entanglement of said matrix fibers with said individualized fibers, the mechanical entanglement and interconnection of said matrix fibers and individualized fibers alone forming a coherent integrated fibrous structure, in which either said matrix or said individualized fibers are composed of a superabsorbent, thermoplastic polymeric composition.
Claim 10
Dependent Claim
98 words
A nonwoven web comprising a matrix of meltblown thermoplastic polymeric fibers and a multiplicity of individualized fibers disposed throughout said matrix and engaging at least some of the matrix fibers to space said matrix fibers apart from each other, said individualized fibers being interconnected by and held captive within said matrix by mechanical entanglement of said matrix fibers with said individualized fibers, the mechanical entanglement and interconnection of said matrix fibers and individualized fibers alone forming a coherent integrated fibrous structure, in which either said matrix or said individualized fibers are composed of a superabsorbent, thermoplastic polymeric composition.
Claim 11
Dependent Claim
12 words
The web of claim 6 in which said composition is a polyurethane.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1992-04-10 | 1992-10-10 | 1993-04-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1996-04-10 | 1996-10-10 | 1997-04-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2000-04-10 | 2000-10-10 | 2001-04-11 | $7700.00 | Window Closed / Lapsed |