US4578069A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Breathable baffle composite
Assignee: Kimberly Clark Worldwide Inc
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Filing: 1984-08-10
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Granted: 1986-03-25
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Expires: 2004-08-10
Abstract
Abstract A sanitary napkin having a gas permeable nonwoven baffle is provided in which a composite baffle is formed by joining webs of a meltblown polyolefin and a spunbonded polyolefin with the spunbonded polyolefin web providing a surface for garment attachment adhesive reception.
Inventors
- 👤 Howard A. Whitehead
- 👤 Ralph V. Braun
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 10:45
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/514; A61F13/51401; A61F13/51405; A61F13/51474; A61F13/51478; A61F13/56; A61F13/58; A61F2013/51441; A61F2013/51443; A61F2013/582
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
97 words
In a sanitary napkin with a top surface and a bottom surface comprising a fluid pervious cover on a top surface an absorbent positioned beneath said cover and an essentially moisture impermeable baffle forming a bottom surface of said napkin, and pressure sensitive garment attachment adhesive attached to the bottom surface the improvement characterized by said baffle being formed by a multi-layer composite of a spunbonded polymeric web of at least 8 grams per square meter and a meltblown polymeric web between 13.0 and 28.0 grams per square meter with said adhesive attached to said spunbonded web.
Claim 2
Dependent Claim
97 words
In a sanitary napkin with a top surface and a bottom surface comprising a fluid pervious cover on a top surface an absorbent positioned beneath said cover and an essentially moisture impermeable baffle forming a bottom surface of said napkin, and pressure sensitive garment attachment adhesive attached to the bottom surface the improvement characterized by said baffle being formed by a multi-layer composite of a spunbonded polymeric web of at least 8 grams per square meter and a meltblown polymeric web between 13.0 and 28.0 grams per square meter with said adhesive attached to said spunbonded web.
Claim 3
Dependent Claim
13 words
The napkin according to claim 1 wherein the composite is formed by fusing.
Claim 4
Dependent Claim
15 words
The napkin according to claim 2 wherein the fused bond area is at least 5%.
Claim 5
Dependent Claim
16 words
The napkin according to claim 2 wherein the fused bond area is between 10 and 30%.
Claim 6
Dependent Claim
20 words
The napkin according to claims 1, 2 or 3 wherein the composite has been treated with a fluid repellent compound.
Claim 7
Dependent Claim
11 words
The napkin according to claim 2 wherein the polymers are compatible.
References Cited (Backward Citations)
US3595235A
Cited
US3595237A
Cited
US3989867A
Cited
US3952347A
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US4013816A
Cited
US4059114A
Cited
US4240416A
Cited
US4315507A
Cited
US4338371A
Cited
US4341216A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1989-03-24 | 1989-09-23 | 1990-03-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-03-24 | 1993-09-23 | 1994-03-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-03-24 | 1997-09-23 | 1998-03-25 | $7700.00 | Window Closed / Lapsed |