US4324246A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Disposable absorbent article having a stain resistant topsheet
Assignee: Procter and Gamble Co
•
Filing: 1980-05-12
•
Granted: 1982-04-13
•
Expires: 2000-05-12
Abstract
Abstract An article of manufacture is disclosed for absorbing liquids, particularly body exudates such as menstrual discharges. An apertured formed film topsheet having a layer of fibers affixed to the inner surface thereof overlays an intermediate layer having a multiplicity of tapered capillaries. The apertured formed film topsheet has a specified combination of caliper, percent open area and percent of apertures having an equivalent hydraulic diameter less than or equal to 0.025 inches (0.064 cm.) which impart a stain resistant character to the topsheet.
Inventors
- 👤 William I. Mullane
- 👤 Douglas J. Smith
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 05:54
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/51; A61F13/511; A61F13/512; A61F13/513; A61F13/51305; A61F13/45; A61F13/47; A61F13/53; A61F13/534; A61F13/537; A61F2013/51002; A61F2013/51038; A61F2013/51042; A61F2013/5127; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/53445; A61F2013/53765; A61F2013/53782; A61F13/539; A61F2013/53908
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
109 words
A disposable absorbent article comprising: an absorbent core means for absorbing liquid, said absorbent core means having a first and a second opposed face; a liquid impermeable backsheet overlaying said first opposed face of said absorbent core means; and a liquid permeable topsheet overlaying said second opposed face of said absorbent core means, said topsheet being a hydrophobic film having a caliper of less than about 0.030 inches, said topsheet a multiplicity of apertures with less than about 25 percent of said apertures having an equivalent hydraulic diameter less than or equal to about 0.025 inches, said topsheet having a percent open area of at least about 35 percent.
Claim 2
Dependent Claim
109 words
A disposable absorbent article comprising: an absorbent core means for absorbing liquid, said absorbent core means having a first and a second opposed face; a liquid impermeable backsheet overlaying said first opposed face of said absorbent core means; and a liquid permeable topsheet overlaying said second opposed face of said absorbent core means, said topsheet being a hydrophobic film having a caliper of less than about 0.030 inches, said topsheet a multiplicity of apertures with less than about 25 percent of said apertures having an equivalent hydraulic diameter less than or equal to about 0.025 inches, said topsheet having a percent open area of at least about 35 percent.
Claim 3
Dependent Claim
21 words
The disposable absorbent article of claim 1 wherein said topsheet has a percent open area of at least about 45 percent.
Claim 4
Dependent Claim
21 words
The disposable absorbent article of claim 1 wherein said topsheet has a percent open area of at least about 55 percent.
Claim 5
Dependent Claim
20 words
The disposable absorbent article of claim 2 or 3 wherein said topsheet has a caliper less than about 0.025 inches.
Claim 6
Dependent Claim
109 words
A catamenial pad comprising: an absorbent core means for absorbing liquid, said absorbent core means having a first and a second opposed face; a liquid impermeable backsheet overlaying said first opposed face of said absorbent core means; and a liquid permeable topsheet overlaying said second opposed face of said absorbent core means, said topsheet being a hydrophobic film having a caliper of less than about 0.030 inches, said topsheet having a multiplicity of apertures with less than about 25 percent of said apertures having an equivalent hydraulic diameter less than or equal to about 0.025 inches, said topsheet having a percent open area of at least about 35 percent.
Claim 7
Dependent Claim
109 words
A catamenial pad comprising: an absorbent core means for absorbing liquid, said absorbent core means having a first and a second opposed face; a liquid impermeable backsheet overlaying said first opposed face of said absorbent core means; and a liquid permeable topsheet overlaying said second opposed face of said absorbent core means, said topsheet being a hydrophobic film having a caliper of less than about 0.030 inches, said topsheet having a multiplicity of apertures with less than about 25 percent of said apertures having an equivalent hydraulic diameter less than or equal to about 0.025 inches, said topsheet having a percent open area of at least about 35 percent.
Claim 8
Dependent Claim
20 words
The catamenial pad of claim 5 wherein said topsheet has a percent open area of at least about 45 percent.
Claim 9
Dependent Claim
20 words
The catamenial pad of claim 5 wherein said topsheet has a percent open area of at least about 55 percent.
Claim 10
Dependent Claim
19 words
The catamenial pad of claim 6 or 7 wherein said topsheet has a caliper less than about 0.025 inches.
References Cited (Backward Citations)
US3560601A
Cited
US3815602A
Cited
US3814101A
Cited
US3875942A
Cited
US3979494A
Cited
US3897784A
Cited
US3929135A
Cited
US3967623A
Cited
US3987792A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1985-04-12 | 1985-10-12 | 1986-04-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1989-04-12 | 1989-10-12 | 1990-04-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1993-04-12 | 1993-10-12 | 1994-04-13 | $7700.00 | Window Closed / Lapsed |