US4287153A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable article with non-leachable saline water indicator
Assignee: GENVENTION Inc A MD CORP
•
Filing: 1979-11-30
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Granted: 1981-09-01
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Expires: 1999-11-30
Abstract
Abstract A disposable article such as a diaper, sanitary napkin, bandage, and the like for absorbing bodily excretions; the article having a quantity of absorbent material placed between the body and a semitransparent water impermeable backsheet wherein the improvement comprises a quantity of saline water indicating material placed in close proximity to both the inner surface of the semitransparent backsheet and the excretion-absorbing material. The saline water indicating material is comprised of a water-insoluble polymeric ion exchanger and a water-insoluble polymeric exchanged-ion indicator in intimate contact with each other. The saline water indicating material may be a particulate composition or a structured material. The saline water indicating material has the three properties of, one, changing color when contacted with urine, perspiration, feces, and other saline bodily excretions; two, not having the exchanged-ion indicator or the ion exchanger leached into the urine, perspiration, feces or other saline excretions thereby not contacting the skin of the body; and, three, the changed color being observable from the outer surface of the semitransparent backsheet. The water insoluble polymeric exchanged-ion indicator component of the saline water indicating material can be a water insoluble polymeric substrate bound acid-base indicator, a water insoluble inherently polymeric acid-base indicator, a water insoluble polymeric substrate bound chelating agent, or water insoluble ion-indicating polymeric ion exchanger.
Inventors
- 👤 Marvin S. Towsend
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 11:38
CPC Classifications
G; G01; G01N; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/525; A; A61; A61F; A61F13/00; A61F13/01; A61F13/01008; A61F13/01034; A61F13/01042; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/56; A61F13/15; A61F13/42; A61F13/53; A61F13/534; A61F2013/00089; A61F2013/00182; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/0074; A61F2013/00846; A61F2013/426; A61F13/51; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/51411; A61F2013/53445
Claims Analysis
Total Claims: 39
Claim 1
Independent Claim
64 words
A disposable article for absorbing bodily excretions, comprising: a quantity of absorbent material for absorbing the bodily excretions; a semitransparent water impermeable backsheet for retaining said absorbent material and the absorbed excretions; and a quantity of non-leachable saline water indicating material placed in contact with said absorbent material and in close proximity to said semitransparent backsheet for indicating the presence of the absorbed excretions.
Claim 2
Dependent Claim
64 words
A disposable article for absorbing bodily excretions, comprising: a quantity of absorbent material for absorbing the bodily excretions; a semitransparent water impermeable backsheet for retaining said absorbent material and the absorbed excretions; and a quantity of non-leachable saline water indicating material placed in contact with said absorbent material and in close proximity to said semitransparent backsheet for indicating the presence of the absorbed excretions.
Claim 3
Dependent Claim
86 words
A disposable article for absorbing bodily excretions, comprising: a quantity of absorbent material for absorbing the bodily excretions; a semitransparent water impermeable backsheet for retaining said absorbent material and the absorbed excretions; and a quantity of non-leachable saline water indicating material placed in contact with said absorbent material and in close proximity to said semitransparent backsheet; said saline water indicating material comprising, in intimate contact, a water insoluble polymeric ion exchanger and a water insoluble polymeric exchanged-ion indicator for indicating the presence of the absorbed excretions.
Claim 4
Dependent Claim
86 words
A disposable article for absorbing bodily excretions, comprising: a quantity of absorbent material for absorbing the bodily excretions; a semitransparent water impermeable backsheet for retaining said absorbent material and the absorbed excretions; and a quantity of non-leachable saline water indicating material placed in contact with said absorbent material and in close proximity to said semitransparent backsheet; said saline water indicating material comprising, in intimate contact, a water insoluble polymeric ion exchanger and a water insoluble polymeric exchanged-ion indicator for indicating the presence of the absorbed excretions.
Claim 5
Dependent Claim
39 words
A disposable article as described in claim 2, wherein: (a) said water insoluble polymeric ion exchanger is a hydrogen ion loaded cation exchanger; and (b) said water insoluble polymeric exchanged-ion indicator is an acid-base indicator in its basic form.
Claim 6
Dependent Claim
53 words
A disposable article as described in claim 3 wherein said water insoluble polymeric acid-base indicator is a cellulose bound acid-base indicator obtained by reacting cellulose with a reactive dyestuff from the group consisting of: 4-anilino-3'-(2-hydroxysulfonyloxy-ethylsulfonyl)-azobenzene-6'-carboxylic acid; 2-(2-sulfo-4,6-dinitrophenylazo)-6-(N-methyl-N-[2-(hydroxysulfonyloxy)-ethyl]-sulfonamido)-1-naphthol-3-sulfonic acid; 4-anilino-3'-(2-hydroxysulfonyloxy-ethylsulfonyl)-azobenzene-6'-sulfonic acid; 4-(N-methyl-N-[2-(hydroxysulfonyloxy)-ethyl]-sulfonamido)-2'-dimethylaminoazobenzene-6'-sulfonic acid; 4-methylamino-4'-(N-methyl-N-[2-(hydroxysulfonyloxy)-ethyl]-sulfonamido)-azobenzene-5-carboxylic acid; 4-methylamino-3'-methyl-4'-(2-hydroxysulfonyloxy-ethylsulfonyl)-6'-methoxy-azobenzene-5-sulfonic acid; 2-[2-sulfo-5-(2-hydroxysulfonyloxy-ethylsulfonyl)-phenylazo]-1-naphthol-3-sulfonic acid; 2-(2,4-dinitrophenylazo)-6-(N-methyl-N-[2-(hydroxysulfonyloxy)-ethyl]-sulfonamido)-1-naphthol-3-sulfonic acid; and mixtures thereof.
Claim 7
Dependent Claim
63 words
A disposable article as described in claim 3 wherein said water insoluble polymeric acid-base indicator is obtained by reacting a partial 2-aminoethyl cellulose ether of cotton with an aqueous mixture of formaldehyde and an acid-base indicator having a hydrogen atom in an activated position relative to a phenolic hydroxy group such as acid-base indicators in the group consisting of o-cresolphthalein; 5',5"-dibromo-o-cresolsulfonphthalein; and 3',3"-dibromothymolsulfonphthalein.
Claim 8
Dependent Claim
25 words
A disposable article as described in claim 3 wherein said water insoluble polymeric acid-base indicator is an acid-base indicator bound to a synthetic polymeric substrate.
Claim 9
Dependent Claim
21 words
A disposable article as described in claim 3 wherein said water insoluble polymeric acid-base indicator is an inherently polymeric acid-base indicator.
Claim 10
Dependent Claim
39 words
A disposable article as described in claim 2, wherein: (a) said water insoluble polymeric ion exchanger is a hydroxyl ion loaded anion exchanger; and (b) said water insoluble polymeric exchanged-ion indicator is an acid-base indicator in its acid form.
Claim 11
Dependent Claim
53 words
A disposable article as described in claim 8 wherein said water insoluble polymeric acid-base indicator is a cellulose bound acid-base indicator obtained by reacting cellulose with a reactive dyestuff from the group consisting of: 4-anilino-3'-(2-hydroxysulfonyloxy-ethylsulfonyl)-azobenzene-6'-carboxylic acid; 2-(2-sulfo-4,6-dinitrophenylazo)-6-(N-methyl-N-[2-hydroxysulfonyloxy)-ethyl]-sulfonamido)-1-naphthol-3-sulfonic acid; 4-anilino-3'-(2-hydroxysulfonyloxy-ethylsulfonyl)-azobenzene-6'-sulfonic acid; 4-(N-methyl-N-[hydroxysulfonyloxy)-ethyl]-sulfonamido)-2'-dimethylaminoazobenzene-6'-sulfonic acid; 4-methylamino-4'-(N-methyl-N-[2-(hydroxysulfonyloxy)-ethyl]-sulfonamido)-azobenzene-5-carboxylic acid; 4-methylamino-3'-methyl-4'-(2-hydroxysulfonyloxy-ethylsulfonyl)-6'-methoxy-azobenzene-5-sulfonic acid; 2-[2-sulfo-5-(2-hydroxysulfonyloxy-ethylsulfonyl)-phenylazo]-1-naphthol-3-sulfonic acid; 2-(2,4-dinitrophenylazo)-6-(N-methyl-N-[2-(hydroxysulfonyloxy)-ethyl]-sulfonamido)-1-naphthol-3-sulfonic acid; and mixtures thereof.
Claim 12
Dependent Claim
62 words
A disposable article as decribed in claim 8 wherein said water insoluble polymeric acid-base indicator is obtained by reacting a partial 2-aminoethyl cellulose ether of cotton with an aqueous mixture of formaldehyde and an acid-base indicator having a atom in an activated position relative to a phenolic hydroxy group such as acid-base indicators in the group consisting of o-cresolphthalein; 5',5"-dibromo-o-cresolsulfonphthalein; and 3',3"-dibromothymolsulfonphthalein.
Claim 13
Dependent Claim
25 words
A disposable article as described in claim 8 wherein said water insoluble polymeric acid-base indicator is an acid-base indicator bound to a synthetic polymeric substrate.
Claim 14
Dependent Claim
21 words
A disposable article as described in claim 8 wherein said water insoluble polymeric acid-base indicator is an inherently polymeric acid-base indicator.
Claim 15
Dependent Claim
41 words
A disposable article as described in claim 2, wherein: (a) said water insoluble polymeric ion exchanger is a cation exchanger in a colored-chelate-forming metal cation loaded form; and (b) said water insoluble polymeric exchanged-ion indicator is a substrate bound chelating agent.
Claim 16
Dependent Claim
36 words
A disposable article as described in claim 13, wherein: (a) said colored-chelate-forming metal cation loaded ion exchanger is a ferric ion loaded cationic exchanger; and (b) said substrate bound chelating agent is cellulose substrate bound 8-hydroxyquinoline.
Claim 17
Dependent Claim
39 words
A disposable article as described in claim 2, wherein: (a) said water insoluble polymeric ion exchanger is an anion exchanger in a colored-ion exchanger-forming anion form; and (b) said water insoluble polymeric exchanged-ion indicator is an exchanged-ion-indicating anionic exchanger.
Claim 18
Dependent Claim
42 words
A disposable article as described in claim 15, wherein (a) said anion exchanger in a colored-ion exchanger-forming anion form is an anion exchanger in the dichromate anion loaded form; and (b) said exchanged-ion-indicating anionic ion exchanger is a diphenylcarbazide ion exchange resin.
Claim 19
Dependent Claim
22 words
A disposable article as described in claim 2 wherein said water insoluble polymeric ion exchanger is a cellulose substrate bound ion exchanger.
Claim 20
Dependent Claim
21 words
A disposable article as described in claim 2 wherein said water insoluble polymeric ion exchanger is a synthetic polymeric ion exchanger.
Claim 21
Dependent Claim
19 words
A disposable article as described in claim 18 wherein said synthetic polymeric ion exchanger is a polyolefin ion exchanger.
Claim 22
Dependent Claim
36 words
A disposable article as described in claim 18 wherein said synthetic polymeric ion exchanger is formed from monomers selected from the group consisting of acrylic acid, methacrylic acid, itaconic acid, maleic acid, aminoalkylacrylates, methacrylates, and itaconates.
Claim 23
Dependent Claim
22 words
A disposable article as described in claim 2 wherein said water insoluble polymeric exchanged-ion indicator is a cellulose substrate bound exchanged-ion indicator.
Claim 24
Dependent Claim
22 words
A disposable article as described in claim 21 wherein said cellulose substrate bound exchanged-ion indicator is a cellulose substrate bound acid-base indicator.
Claim 25
Dependent Claim
22 words
A disposable article as described in claim 21 wherein said cellulose substrate bound exchanged-ion indicator is a cellulose substrate bound chelating agent.
Claim 26
Dependent Claim
20 words
A disposable article as described in claim 23 wherein said cellulose substrate bound chelating agent is cellulose substrate bound 8-hydroxyquinoline.
Claim 27
Dependent Claim
25 words
A disposable article as described in claim 2 wherein said saline water indicating material is in the form of an amorphous stock of absorbent material.
Claim 28
Dependent Claim
24 words
A disposable article as described in claim 2 wherein said saline water indicating material as in the form of a dusting of particulate material.
Claim 29
Dependent Claim
20 words
A disposable article as described in claim 26 wherein said dusting of particulate material is applied to the semitransparent backsheet.
Claim 30
Dependent Claim
26 words
A disposable article as described in claim 26 wherein said dusting of particulate material is applied to the quantity of absorbent material facing the semitransparent backsheet.
Claim 31
Dependent Claim
21 words
A disposable article as described in claim 2 wherein said saline water indicating material is in the form of a coating.
Claim 32
Dependent Claim
17 words
A disposable article as described in claim 29 wherein said coating is applied to the semitransparent backsheet.
Claim 33
Dependent Claim
23 words
A disposable article as described in claim 29 wherein said coating is applied to the quantity of absorbent material facing the semitransparent backsheet.
Claim 34
Dependent Claim
24 words
A disposable article as described in claim 29 wherein said coating is comprised of a pigmentized saline water indicating material in a hydrophilic film.
Claim 35
Dependent Claim
23 words
A disposable article as described in claim 2 wherein said saline water indicating material is in the form of a structured absorbent material.
Claim 36
Dependent Claim
20 words
A disposable article as described in claim 33 wherein said structured absorbent material is in the form of a fabric.
Claim 37
Dependent Claim
20 words
A disposable article as described in claim 33 wherein said structured absorbent material is in the form of a sheet.
Claim 38
Dependent Claim
20 words
A disposable article as described in claim 33 wherein said structured absorbent material is in the form of a foam.
Claim 39
Dependent Claim
32 words
A disposable article as described in claim 2 wherein said water insoluble polymeric ion exchanger and said water insoluble polymeric exchanged-ion indicator are in intimate contact as a result of interpolymeric impregnation.
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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) | 1984-08-31 | 1985-03-02 | 1985-09-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1988-08-31 | 1989-03-02 | 1989-09-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1992-08-31 | 1993-03-02 | 1993-09-01 | $7700.00 | Window Closed / Lapsed |