US4394930A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent foam products
Assignee: Johnson and Johnson
•
Filing: 1981-03-27
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Granted: 1983-07-26
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Expires: 2001-03-27
Abstract
Abstract A foam product having both absorptive and cushioning properties is prepared from a solid, particulate, water-insoluble, water-swellable polymer having a gel capacity of at least 10, a solid, particulate blowing agent, and a liquid polyhydroxy organic compound. Foamable compositions and articles employing the foam are also described.
Inventors
- 👤 Ralf Korpman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 13:19
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61L; A61L15/00; A61L15/16; A61L15/20; A61L15/42; A61L15/425; A61L15/60; A61F13/20; A61F2013/15008; A61F2013/15048; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530481; A61F2013/530489; A61F2013/530496; A61F2013/530802; Y; Y10; Y10S; Y10S220/00; Y10S220/902; Y10T; Y10T428/00; Y10T428/13; Y10T428/1352; Y10T428/1376; Y10T428/249921; Y10T428/249953; Y10T428/249981; Y10T428/249986; Y10T428/249987; Y10T428/249991; Y10T428/249992; Y10T428/249993; Y10T442/00; Y10T442/60; Y10T442/647
Claims Analysis
Total Claims: 23
Claim 1
Independent Claim
39 words
An absorbent foam product prepared by mixing together a solid, particulate, water-insoluble, water-swellable polymer having a gel capacity of at least 10, a solid, particulate blowing agent, and a liquid polyhydroxy organic compound and allowing the mixture to foam.
Claim 2
Dependent Claim
39 words
An absorbent foam product prepared by mixing together a solid, particulate, water-insoluble, water-swellable polymer having a gel capacity of at least 10, a solid, particulate blowing agent, and a liquid polyhydroxy organic compound and allowing the mixture to foam.
Claim 3
Dependent Claim
15 words
A product according to claim 1 wherein the particulate water-insoluble, water-swellable polymer is starch polyacrylate.
Claim 4
Dependent Claim
16 words
A product according to claim 1 wherein the solid particulate water-insoluble, water-swellable polymer is cellulose polyacrylate.
Claim 5
Dependent Claim
15 words
A product according to claim 1 wherein the solid, particulate water-insoluble, water-swellable polymer is polyacrylate.
Claim 6
Dependent Claim
13 words
A product according to claim 1 wherein the liquid polyhydroxy compound is glycerol.
Claim 7
Dependent Claim
14 words
A product according to claim 1 wherein the liquid polyhydroxy compound is ethylene glycol.
Claim 8
Dependent Claim
48 words
A product according to claim 1 wherein from about 25 to 125 parts by weight the particulate, water-insoluble, water-swellable polymer and from about 2 to 30 parts by weight of the solid, particulate blowing agent are employed for every 100 parts by weight of liquid polyhydroxy organic compound.
Claim 9
Dependent Claim
23 words
A product according to claim 1 wherein the water-insoluble water-swellable polymer is starch polyacrylate and the liquid polyhydroxy organic compound is ethylene glycol.
Claim 10
Dependent Claim
21 words
A product according to claim 1 wherein the water-insoluble water-swellable polymer is polyacrylate and the liquid polyhydroxy organic compound is glycerol.
Claim 11
Dependent Claim
50 words
A product according to claim 1 wherein from about 40 to 80 parts by weight of the particulate, water-insoluble water-swellable polymer and from about 2 to about 30 parts by weight of the solid, particulate blowing agent are employed for every 100 parts by weight of liquid polyhydroxy organic compound.
Claim 12
Dependent Claim
26 words
A product according to claim 1 wherein the mixture is allowed to foam by standing at ambient temperature for from about 1 to about 24 hours.
Claim 13
Dependent Claim
39 words
A product according to claim 1 wherein the mixture is allowed to foam by subjecting the mixture to a temperature in the range of about 200° F. to 450° F. for from a few seconds to a few minutes.
Claim 14
Dependent Claim
58 words
A absorbent foam forming composition comprising relative proportions of (a) 25 to 125 parts by weight of a solid, particulate, water-insoluble, water-swellable polymer having a gel capacity of at least 10 as absorbent, (b) 100 parts by weight of a liquid polyhydroxy organic compound, and (c) 2 to 30 parts by weight of a solid, particulate blowing agent.
Claim 15
Dependent Claim
58 words
A absorbent foam forming composition comprising relative proportions of (a) 25 to 125 parts by weight of a solid, particulate, water-insoluble, water-swellable polymer having a gel capacity of at least 10 as absorbent, (b) 100 parts by weight of a liquid polyhydroxy organic compound, and (c) 2 to 30 parts by weight of a solid, particulate blowing agent.
Claim 16
Dependent Claim
61 words
An absorbent article comprising a foam coated substrate, said foam coated substrate obtained by (a) mixing together a solid, particulate, water-insoluble, water-swellable polymer having a gel capacity of at least 10, a solid, particulate blowing agent, and a liquid polyhydroxy organic compound to obtain a foamable composition, (b) coating said composition onto a substrate, and (c) allowing the mixture to foam.
Claim 17
Dependent Claim
61 words
An absorbent article comprising a foam coated substrate, said foam coated substrate obtained by (a) mixing together a solid, particulate, water-insoluble, water-swellable polymer having a gel capacity of at least 10, a solid, particulate blowing agent, and a liquid polyhydroxy organic compound to obtain a foamable composition, (b) coating said composition onto a substrate, and (c) allowing the mixture to foam.
Claim 18
Dependent Claim
39 words
An article according to claim 14 in which the foaming is carried out by subjecting the mixture to a temperature in the range of about 200° F. to 450° F. for from a few seconds to a few minutes.
Claim 19
Dependent Claim
14 words
An article according to claim 14 in which the substrate is a polyethylene film.
Claim 20
Dependent Claim
15 words
An article according to claim 14 in which the substrate is a non-woven cellulosic fabric.
Claim 21
Dependent Claim
17 words
An article according to claim 14 in which the substrate is a layer of wood pulp material.
Claim 22
Dependent Claim
67 words
A dual walled container for transporting aqueous fluids having a breakable inner wall and a non-breakable outer wall and having in a portion of the space between the two containers walls, a foam prepared by mixing together solid, particulate, water-insoluble, water-swellable polymer having a gel capacityy of at least 10, a solid, particulate blowing agent, and a liquid polyhydroxy organic compound and allowing the mixture to foam.
Claim 23
Dependent Claim
67 words
A dual walled container for transporting aqueous fluids having a breakable inner wall and a non-breakable outer wall and having in a portion of the space between the two containers walls, a foam prepared by mixing together solid, particulate, water-insoluble, water-swellable polymer having a gel capacityy of at least 10, a solid, particulate blowing agent, and a liquid polyhydroxy organic compound and allowing the mixture to foam.
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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) | 1986-07-25 | 1987-01-24 | 1987-07-26 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1990-07-25 | 1991-01-24 | 1991-07-26 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1994-07-25 | 1995-01-24 | 1995-07-26 | $7700.00 | Window Closed / Lapsed |