Patent US3757785A successfully refreshed from Google Patents.
US3757785A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Airfelt diaper with short fiber material in the pinning area
Assignee: Procter and Gamble Co
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Filing: 1971-12-09
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Granted: 1973-09-11
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Expires: 1991-12-09
Abstract
Abstract A diaper wherein the absorbent body is of low tensile strength, e.g., airfelt, and the absorbent body extends throughout the pinning area, wherein the airfelt material in the pinning area has an average fiber length of from about 0.5 mm. to about 0.9 mm. so that those fibers do not accumulate on a pin as the pin tip moves through the absorbent body during pinning of the diaper.
Inventors
- 👤 C Wosaba
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-26 18:36
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/531; A61F13/532; A61F13/56; A61F13/5622; A61F2013/5326
Claims Analysis
Total Claims: 4
Claim 1
Independent Claim
106 words
A diaper comprising an absorbent body of non-bonded fibers contained between a superposed top sheet and one other web which have substantial strength when wet, said diaper being adapted to be pinned through the absorbent body to retain it in its operative position, the absorbent body being formed from fibers having an average length of from about 0.5 mm. to about 0.9 mm. in the pinning areas through which diaper pins are pierced during the pinning process, the basis weight of said absorbent body in the pinning areas being at least approximately 0.08 grams per square inch and less than approximately 0.25 grams per square inch.
Claim 2
Dependent Claim
106 words
A diaper comprising an absorbent body of non-bonded fibers contained between a superposed top sheet and one other web which have substantial strength when wet, said diaper being adapted to be pinned through the absorbent body to retain it in its operative position, the absorbent body being formed from fibers having an average length of from about 0.5 mm. to about 0.9 mm. in the pinning areas through which diaper pins are pierced during the pinning process, the basis weight of said absorbent body in the pinning areas being at least approximately 0.08 grams per square inch and less than approximately 0.25 grams per square inch.
Claim 3
Dependent Claim
15 words
The diaper of claim 1 backed by a thin flexible back sheet of waterproof material.
Claim 4
Dependent Claim
27 words
The diaper of claim 2 in which said absorbent body is comprised of air laid wood pulp fibers and said top sheet is a porous, non-woven material.
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) | 1976-09-10 | 1977-03-12 | 1977-09-11 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-09-10 | 1981-03-12 | 1981-09-11 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-09-10 | 1985-03-12 | 1985-09-11 | $7700.00 | Window Closed / Lapsed |