US4055184A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent pad
Assignee: Colgate Palmolive Co
•
Filing: 1976-05-10
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Granted: 1977-10-25
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Expires: 1996-05-10
Abstract
Abstract An absorbent pad such as a disposable diaper, sanitary napkin, bandage or the like for use in contact with the skin for absorbing body fluids and having a mass of material including a solid, finely-divided mixture of a hydrolyzed starch polyacrylonitrile graft copolymer in acidic form comprised of 0.6 to 2 parts by weight of hydrolyzed grafted polyacrylonitrile in acidic form per part by weight of starch and a non-irritating and non-toxic water-soluble basic material, the relative proportion of base to copolymer being from 1:4 to 1:1 by weight.
Inventors
- 👤 Hamzeh Karami
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:31
CPC Classifications
A; A61; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/425; A61L15/18; A61L15/60
Claims Analysis
Total Claims: 8
Claim 1
Independent Claim
100 words
An absorbent pad for use in contact with the skin comprising a water pervious facing layer for contacting the skin, a water-impervious backing sheet bonded to the facing layer around its periphery to form a container, and disposed within said container an absorbent mass comprising a solid finely-divided mixture of (1) a completely hydrolyzed starch-polyacrylonitrile graft copolymer in acidic form containing 0.6 to 2 parts by weight of grafted hydrolyzed polyacrylonitrile per part by weight of starch and (2) a non-irritating and non-toxic water-soluble basic material, the relative proportion of base to copolymer being from 1:4 to 1:1 by weight.
Claim 2
Dependent Claim
100 words
An absorbent pad for use in contact with the skin comprising a water pervious facing layer for contacting the skin, a water-impervious backing sheet bonded to the facing layer around its periphery to form a container, and disposed within said container an absorbent mass comprising a solid finely-divided mixture of (1) a completely hydrolyzed starch-polyacrylonitrile graft copolymer in acidic form containing 0.6 to 2 parts by weight of grafted hydrolyzed polyacrylonitrile per part by weight of starch and (2) a non-irritating and non-toxic water-soluble basic material, the relative proportion of base to copolymer being from 1:4 to 1:1 by weight.
Claim 3
Dependent Claim
30 words
An absorbent pad as claimed in claim 1 in which said mass is in the form of a highly porous batt of cellulosic fibers carrying said finely-divided mixture dispersed therein.
Claim 4
Dependent Claim
35 words
An absorbent pad as claimed in claim 1 in which said mass is in the form of a highly porous batt of cellulosic fibers carrying said finely-divided mixture disposed adjacent one face of said batt.
Claim 5
Dependent Claim
35 words
An article as claimed in claim 1 in which said mass is in the form of a highly porous batt of cellulosic fibers carrying said finely-divided mixture disposed between said facing layer and said batt.
Claim 6
Dependent Claim
36 words
An absorbent pad as claimed in claim 1 in which said mass is in the form of a highly porous batt of cellulosic fibers carrying said finely-divided mixture disposed between said backing sheet and said batt.
Claim 7
Dependent Claim
34 words
An absorbent pad as claimed in claim 1 in which said mass is in the form of a plurality of highly porous batts of cellulosic fibers carrying said finely-divided mixture disposed between said batts.
Claim 8
Dependent Claim
32 words
An absorbent pad as claimed in claim 1 in which said mass is in the form of a mass of shredded polyurethane foam particles carrying said finely-divided mixture dispersed in said mass.
References Cited (Backward Citations)
US3425971A
Cited
US3661815A
Cited
US3814101A
Cited
US3794029A
Cited
US3888256A
Cited
US3903889A
Cited
US3871037A
Cited
US3927673A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-10-24 | 1981-04-25 | 1981-10-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-10-24 | 1985-04-25 | 1985-10-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-10-24 | 1989-04-25 | 1989-10-25 | $7700.00 | Window Closed / Lapsed |