US3945386A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable diaper
Assignee: Domtar Inc
•
Filing: 1972-08-08
•
Granted: 1976-03-23
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Expires: 1992-08-08
Abstract
Abstract A disposable diaper constructed to keep the hydrophobic diaper facing sheet relatively dry by interposing a perforated plastic film between the facing and the absorbent pad.
Inventors
- 👤 Edward Anczurowski
- 👤 Brian E. Julien
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 00:54
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/53409; A61F13/51; A61F13/511; A61F13/513; A61F13/51305; A61F13/537; A61F13/53708; A61F13/53713; A61F13/53743; A61F13/53747; A61F2013/53765; A61F2013/53782; Y; Y10; Y10T; Y10T428/00; Y10T428/24; Y10T428/24273; Y10T428/24298; Y10T428/24314
Claims Analysis
Total Claims: 2
Claim 1
Independent Claim
175 words
A diaper comprising a hydrophobic diaper facing sheet, an absorbent pad, a discrete perforated plastic film interposed between said facing sheet and said pad, an impervious backing sheet covering the side of said pad remote from said facing sheet, said pad and said discrete perforated plastic film being in intimate contact to ensure body fluids passing through said perforations immediately contact said pad, said perforated film being indented about each perforation thereby to provide a funnel like surface surrounding each perforation, said funnel like surface tapering in toward said pad, said perforations being sufficiently large to permit easy penetration of body fluids yet sufficiently small that the facing sheet bridges each of said perforations, each said perforation is equivalent in open area to a hole one-sixteenth to three-eighths inch in diameter and said perforations are located on centers spaced between one-fourth and three-fourths of an inch, said film substantially eliminating contact between said hydrophobic facing sheet and said pad whereby migration of said fluids from said pad back into said hydrophobic facing sheet is impaired.
Claim 2
Dependent Claim
175 words
A diaper comprising a hydrophobic diaper facing sheet, an absorbent pad, a discrete perforated plastic film interposed between said facing sheet and said pad, an impervious backing sheet covering the side of said pad remote from said facing sheet, said pad and said discrete perforated plastic film being in intimate contact to ensure body fluids passing through said perforations immediately contact said pad, said perforated film being indented about each perforation thereby to provide a funnel like surface surrounding each perforation, said funnel like surface tapering in toward said pad, said perforations being sufficiently large to permit easy penetration of body fluids yet sufficiently small that the facing sheet bridges each of said perforations, each said perforation is equivalent in open area to a hole one-sixteenth to three-eighths inch in diameter and said perforations are located on centers spaced between one-fourth and three-fourths of an inch, said film substantially eliminating contact between said hydrophobic facing sheet and said pad whereby migration of said fluids from said pad back into said hydrophobic facing sheet is impaired.
References Cited (Backward Citations)
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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) | 1979-03-23 | 1979-09-22 | 1980-03-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1983-03-23 | 1983-09-22 | 1984-03-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1987-03-23 | 1987-09-22 | 1988-03-23 | $7700.00 | Window Closed / Lapsed |