Patent US4773904A successfully refreshed from Google Patents.
US4773904A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent article
Assignee: Kao Corp
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Filing: 1986-09-12
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Granted: 1988-09-27
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Expires: 2006-09-12
Abstract
Abstract An absorbent article comprises a surface sheet, an absorbent and a back sheet, a part or all, being not to contact the skin, of said back sheet having the below listed three requirements: (a) a coefficient of a kinetic friction against an acrylic resin plate is 1.5 or higher, (b) it is elastic so that it breaks at a length of 300 or larger percent based on the original length, and (c) a force to stretch it by 50 percent based on the original length is 100 kg/cm2 or larger.
Inventors
- 👤 Minoru Nakanishi
- 👤 Akira Sakurai
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 11:11
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/514; A61F13/51474; A61F13/51484; A61F13/51456; A61F13/51464; A61F13/515; A61F13/53; A61F13/534; A61F2013/15008; A61F2013/15113; A61F2013/51097; A61F13/51401; A61F2013/51409; A61F2013/53445; Y; Y10; Y10T; Y10T428/00; Y10T428/28; Y10T428/31504; Y10T428/31855; Y10T428/3188; Y10T428/31935; Y10T428/31971; Y10T428/31989; Y10T428/31993
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
101 words
An absorbent article comprising, a surface sheet, a back sheet, and an absorbent layer disposed therebetween wherein a part or all of said back sheet is not in contact with the skin of a user, said back sheet having (a) a coefficient of kinetic friction against an acrylic resin plate of 1.5 or higher, (b) an elasticity such that said back sheet breaks at a length of 300 percent or greater, based on the original length, and (c) a force of 100 kg/cm 2 or less being required to stretch said back sheet by 50 percent based on the original length.
Claim 2
Dependent Claim
101 words
An absorbent article comprising, a surface sheet, a back sheet, and an absorbent layer disposed therebetween wherein a part or all of said back sheet is not in contact with the skin of a user, said back sheet having (a) a coefficient of kinetic friction against an acrylic resin plate of 1.5 or higher, (b) an elasticity such that said back sheet breaks at a length of 300 percent or greater, based on the original length, and (c) a force of 100 kg/cm 2 or less being required to stretch said back sheet by 50 percent based on the original length.
Claim 3
Dependent Claim
37 words
An absorbent article as claimed in claim 1, in which a part or all of said back sheet is an elastomer selected from the group consisting of a conjugated diene polymer, polyethylene, polypropylene, polybutylene and polyvinylidene chloride.
Claim 4
Dependent Claim
23 words
An absorbent article as claimed in claim 1, in which a part or all of said back sheet is formed from an elastomer.
Claim 5
Dependent Claim
27 words
An absorbent article according to claim 1 wherein said backing sheet extends along the sides of said absorbent layer and covers a portion of said surface sheet.
Claim 6
Dependent Claim
33 words
An absorbent article according to claim 1 wherein said surface sheet extends along the lateral sides of said absorbent layer and attaches to said back sheet at the base of said absorbent layer.
Claim 7
Dependent Claim
24 words
An absorbent article according to claim 1 wherein said surface sheet and said back sheet meet at the mid-lateral sides of said absorbent layer.
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) | 1991-09-27 | 1992-03-28 | 1992-09-27 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-09-27 | 1996-03-28 | 1996-09-27 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-09-27 | 2000-03-28 | 2000-09-27 | $7700.00 | Window Closed / Lapsed |