US3890974A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable absorbent article containing slitted hydrogel film
Assignee: Glad Products Co
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Filing: 1974-06-18
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Granted: 1975-06-24
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Expires: 1994-06-18
Abstract
Abstract Disposable absorbent articles are disclosed which include a topsheet, a liquid impermeable backsheet, and a hydrophilic, substantially water insoluble film disposed between the topsheet and the backsheet. The film contains a plurality of straight slits, of specific length, whereby liquid contacting the film causes the film to swell and to thereby open said slits to permit passage of the liquid therethrough.
Inventors
- 👤 Theodore F Kozak
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 17:07
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/512; B; B32; B32B; B32B3/00; B32B3/26; B32B3/266; A61F13/51121; A61F13/513; A61F13/51305; A61F13/53; A61F13/534; A61F13/537; A61F13/53704; A61F13/53708; A61F13/53713; A61F13/53743; A61F13/53752; A61L; A61L15/00; A61L15/16; A61L15/42; A61L15/60; B32B27/00; B32B27/06; B32B27/12; B32B27/16; B32B27/28; B32B27/285; B32B27/32; B32B7/00; B32B7/04; B32B7/12; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530481; A61F2013/530583; A61F2013/530635; A61F2013/53445; A61F2013/53765; A61F2013/53782; B32B2262/00; B32B2262/06; B32B2262/062; B32B2307/00; B32B2307/30; B32B2307/31; B32B2307/70; B32B2307/716; B32B2307/726; B32B2307/7265; B32B2307/728; B32B2307/73; B32B2323/00; B32B2323/04; B32B2555/00; B32B2555/02
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
80 words
A DISPOSABLE ABSORBENT ARTICLE FOR PLACEMENT ADJACENT TO THE BODY, INCLUDING: A. A HYDROPHOBIC LIQUID PERMEABLE TOPSHEET FOR PLACEMENT ADJACENT TO THE BODY; B. A LIQUID IMPREMEABLE BACKSHEET; AND C. A HYDROPHILIC, SUBSTANTIALLY WATER INSOLUBLE FILM DISPOSED BETWEEN SAID TOP SHEET AND SAID BASKSHEET, SAID FILM CONTAINING A PLURALITY OF SLITS OF FROM ABOUT 1/6 TO 3/8 INCH IN LENGTH, WHEREBY LIQUID CONTACTING SAID FILM CAUSES THE FILM TO SWELL THEREBY OPENING SAID SLITS TO PERMIT PASSAGE OF LIQUID THERETHROUGH.
Claim 2
Dependent Claim
80 words
A DISPOSABLE ABSORBENT ARTICLE FOR PLACEMENT ADJACENT TO THE BODY, INCLUDING: A. A HYDROPHOBIC LIQUID PERMEABLE TOPSHEET FOR PLACEMENT ADJACENT TO THE BODY; B. A LIQUID IMPREMEABLE BACKSHEET; AND C. A HYDROPHILIC, SUBSTANTIALLY WATER INSOLUBLE FILM DISPOSED BETWEEN SAID TOP SHEET AND SAID BASKSHEET, SAID FILM CONTAINING A PLURALITY OF SLITS OF FROM ABOUT 1/6 TO 3/8 INCH IN LENGTH, WHEREBY LIQUID CONTACTING SAID FILM CAUSES THE FILM TO SWELL THEREBY OPENING SAID SLITS TO PERMIT PASSAGE OF LIQUID THERETHROUGH.
Claim 3
Dependent Claim
31 words
The disposable, absorbent article of claim 1 wherein said hydrophilic, substantially water insoluble film is selected from the group consisting of irradiated polyalkylene oxide, polyvinyl pyrrolidone, polyacrylic acid, and mixtures thereof.
Claim 4
Dependent Claim
18 words
The disposable, absorbent article of claim 2 wherein said hydrophilic, substantially water insoluble film is irradiated polyethylene oxide.
Claim 5
Dependent Claim
23 words
The disposable, absorbent article of claim 3 wherein said article includes a layer of hydrophilic, absorbent material intermediate said film and said backsheet.
Claim 6
Dependent Claim
23 words
The disposable, absorbent article of claim 3 wherein said article includes a layer of hydrophilic, absorbent material on each side of said film.
Claim 7
Dependent Claim
68 words
A disposable diaper comprising in combination, the hydrophobic topsheet, the substantially liquid impermeable backsheet, and the hydrophilic substantially water insoluble film as defined in claim 1 wherein the topsheet and backsheet are of substantially the same dimension and being at least partially adhered to each other around their periphery to form an integrated diaper structure having said film substantially enclosed and sandwiched between the topsheet and the backsheet.
Claim 8
Dependent Claim
32 words
A disposable diaper as claimed in claim 6 wherein said hydrophilic, substantially water insoluble film is selected from the group consisting of irradiated polyalkylene oxide, polyvinyl pyrrolidone, polyacrylic acid, and mixtures thereof.
Claim 9
Dependent Claim
19 words
A disposable diaper as claimed in claim 7 wherein said hydrophilic, substantially water insoluble film is irradiated polyethylene oxide.
Claim 10
Dependent Claim
24 words
A disposable diaper as claimed in claim 8 wherein said diaper includes a layer of hydrophilic, absorbent material intermediate said film and said backsheet.
Claim 11
Dependent Claim
24 words
A disposable diaper as claimed in claim 6 wherein said film contains a plurality of slits of from 2/16 to 5/16 inch in length.
Claim 12
Dependent Claim
24 words
A disposable diaper as claimed in claim 6 wherein said film contains from 2 to about 24 slits per square inch of film area.
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) | 1978-06-23 | 1978-12-23 | 1979-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1982-06-23 | 1982-12-23 | 1983-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1986-06-23 | 1986-12-23 | 1987-06-24 | $7700.00 | Window Closed / Lapsed |