US4318408A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Absorbent products
Assignee: Johnson and Johnson
•
Filing: 1979-10-29
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Granted: 1982-03-09
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Expires: 1999-10-29
Abstract
Abstract A flexible non-disintegrative absorbent product comprising a water-insoluble substantially non-swelling matrix of an elastomeric polymer bearing a uniformly dispersed particulate water-insoluble water-swellable organic polymer absorbent. Certain compositions and processes for their preparation as well as articles prepared from the products are described.
Inventors
- 👤 Ralf Korpman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-25 09:17
CPC Classifications
C; C08; C08L; C08L33/00; C08L33/02; A; A61; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/24; A61L15/42; A61L15/60; C08L53/00; C08L53/02; C08L2205/00; C08L2205/22; Y; Y10; Y10S; Y10S604/00; Y10S604/904
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
108 words
An elastic non-disintegrative absorbent product having a thickness ranging from about 1 to 60 mils comprising a water-insoluble substantially non-swelling matrix of an elastomeric polymer bearing uniformly dispersed and at least partially imbedded therein particulate water-insoluble water-swellable organic polymer absorbent wherein said elastomeric polymer comprises a thermoplastic elastomeric A-B-A or A-B block copolymer in which A represents an alkenylarene polymer block and in which b represents a polymer block of a conjugated lower aliphatic diene or lower aliphatic alkene and wherein said water-insoluble, water-swellable organic polymer absorbent is a cross-linked polymer having an average molecular weight per cross-linkage in the range of from about 13,000 to about 276,000.
Claim 2
Dependent Claim
108 words
An elastic non-disintegrative absorbent product having a thickness ranging from about 1 to 60 mils comprising a water-insoluble substantially non-swelling matrix of an elastomeric polymer bearing uniformly dispersed and at least partially imbedded therein particulate water-insoluble water-swellable organic polymer absorbent wherein said elastomeric polymer comprises a thermoplastic elastomeric A-B-A or A-B block copolymer in which A represents an alkenylarene polymer block and in which b represents a polymer block of a conjugated lower aliphatic diene or lower aliphatic alkene and wherein said water-insoluble, water-swellable organic polymer absorbent is a cross-linked polymer having an average molecular weight per cross-linkage in the range of from about 13,000 to about 276,000.
Claim 3
Dependent Claim
44 words
A product according to claim 1 in which the absorbent has a particle size of from about 1 micron to about 2×10 4 microns in cross section and comprises from about 5 to about 200 parts per 100 parts by weight of matrix polymer.
Claim 4
Dependent Claim
17 words
A product according to claim 1 in which the product is in the form of a film.
Claim 5
Dependent Claim
19 words
A product according to claim 1 in which the product is in the form of a monofilament or rope.
Claim 6
Dependent Claim
38 words
A product according to claim 1 in which the elastomeric polymer is a thermoplastic-elastomeric A-B-A or A-B block copolymer or a mixture thereof in which the polymer absorbent is a synthetic acrylate polymer or an acrylate modified polysaccharide.
Claim 7
Dependent Claim
17 words
A thin absorbent article comprising an absorbent product of claim 5 faced with a liquid permeable sheet.
Claim 8
Dependent Claim
20 words
An article according to claim 6 in which the absorbent product is, in addition, backed with a liquid impermeable sheet.
Claim 9
Dependent Claim
9 words
A tampon comprising the absorbent product of claim 5.
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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) | 1985-03-08 | 1985-09-07 | 1986-03-09 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-03-08 | 1989-09-07 | 1990-03-09 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-03-08 | 1993-09-07 | 1994-03-09 | $7700.00 | Window Closed / Lapsed |