US4904521A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Melt-blown nonwoven wiper
Assignee: Kimberly Clark Worldwide Inc
•
Filing: 1989-05-26
•
Granted: 1990-02-27
•
Expires: 2009-05-26
Abstract
Abstract There is disclosed a nonwoven wiper comprising a composite web made of a number of interbonded layers of meltblown thermoplastic fibers. The outer layers have average pore sizes greater than 20 microns and preferably greater than 40 microns for rapid pick up of liquid. The internal layers have average pore sizes between 10-20 microns for liquid holding capacity.
Inventors
- 👤 Malcolm L. Johnson
- 👤 Tracey A. Burbank
- 👤 Mark D. Strickland
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-29 15:55
CPC Classifications
B; B32; B32B; B32B5/00; B32B5/22; B32B5/24; B32B5/26; A; A47; A47L; A47L13/00; A47L13/10; A47L13/16; A61; A61F; A61F13/00; A61F13/15; A61F13/15203; A61F13/53; A61F13/534; D; D04; D04H; D04H1/00; D04H1/40; D04H1/42; D04H1/4374; D04H1/54; D04H1/559; D04H1/56; A61F13/15577; A61F2013/15821; A61F2013/15934; A61F2013/15967; B32B2305/00; B32B2305/02; B32B2305/026; B32B2309/00; B32B2309/02; B32B2432/00; Y; Y10; Y10S; Y10S428/00; Y10S428/903; Y10T; Y10T442/00; Y10T442/60; Y10T442/659
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
59 words
A nonwoven wiper comprising a composite web comprising interbonded layers of melt-blown thermoplastic fibers, the web having a pore size distribution across its thickness, wherein the web has at least one outer layer having pores with an average size greater than 20 microns and at least one other layer having pores of an average size less than 20 microns.
Claim 2
Dependent Claim
59 words
A nonwoven wiper comprising a composite web comprising interbonded layers of melt-blown thermoplastic fibers, the web having a pore size distribution across its thickness, wherein the web has at least one outer layer having pores with an average size greater than 20 microns and at least one other layer having pores of an average size less than 20 microns.
Claim 3
Dependent Claim
36 words
The nonwoven wiper of claim 1, wherein the outer layer has pores with an average size greater than 40 microns and the other layer has pores with an average size between 10 microns and 20 microns.
References Cited (Backward Citations)
US31885A
Cited
US3849241A
Cited
US3795571A
Cited
USRE31885E
Cited
US4436780A
Cited
US4666763A
Cited
US4774125A
Cited
US4714647A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-02-26 | 1993-08-28 | 1994-02-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-02-26 | 1997-08-28 | 1998-02-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-02-26 | 2001-08-28 | 2002-02-27 | $7700.00 | Window Closed / Lapsed |