Patent US4184498A successfully refreshed from Google Patents.
US4184498A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanitary napkin
Assignee: Johnson and Johnson
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Filing: 1977-04-08
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Granted: 1980-01-22
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Expires: 1997-04-08
Abstract
Abstract Disposable sanitary napkin comprising an absorbent structure imprisoned between an outer, impermeable film and an inner, permeable covering, by the edges of the film and the edges of the covering being joined together. Said absorbent structure comprises a main absorbent pad having the form of an oblong, tapering towards the rear, and having two side swellings and possibly a secondary absorbent pad less compact than the main absorbent pad. The invention also relates to a method of manufacturing such a sanitary napkin.
Inventors
- 👤 Pierre Franco
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:45
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/45; A61F13/47; A61F13/472; A61F13/15577; A61F13/15617; A61F13/15634; A61F13/47236; A61F13/47245; A61F13/53; A61F13/534; A61F13/535; A61F13/536; A61F13/51; A61F13/511; A61F13/537; A61F13/539; A61F13/56; A61F13/58; A61F2013/15821; A61F2013/4587; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530131; A61F2013/53445; A61F13/53708; A61F2013/53721; A61F2013/53908; A61F2013/5395; A61F2013/582
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
120 words
A disposable sanitary napkin comprising an absorbent structure, an outer, impermeable film and an inner, permeable covering, said absorbent structure comprising a main absorbent pad which is formed by compacting an absorbent material to impart to it a generally oblong shape having front and rear ends, two side swellings projecting on the inner covering side, joining at the front and rear of the napkin and connected together by a thinner central portion whose density of compaction is higher than that of said side swellings, said main absorbent pad having in section the form of an open U conferring anatomical shape to the napkin and allowing the menstrual flow absorbed in the thinner central portion to pass into the side swellings.
Claim 2
Dependent Claim
120 words
A disposable sanitary napkin comprising an absorbent structure, an outer, impermeable film and an inner, permeable covering, said absorbent structure comprising a main absorbent pad which is formed by compacting an absorbent material to impart to it a generally oblong shape having front and rear ends, two side swellings projecting on the inner covering side, joining at the front and rear of the napkin and connected together by a thinner central portion whose density of compaction is higher than that of said side swellings, said main absorbent pad having in section the form of an open U conferring anatomical shape to the napkin and allowing the menstrual flow absorbed in the thinner central portion to pass into the side swellings.
Claim 3
Dependent Claim
22 words
A sanitary napkin according to claim 1, wherein said main absorbent pad is formed by compacting an absorbent material in sheet form.
Claim 4
Dependent Claim
23 words
A sanitary napkin according to claim 1, wherein said main absorbent pad is formed by compacting absorbent material in the form of flocks.
Claim 5
Dependent Claim
21 words
A sanitary napkin according to claim 1, wherein said main absorbent pad is formed by compacting absorbent material in fiber form.
Claim 6
Dependent Claim
18 words
A sanitary napkin according to claim 2 or 14, wherein the said absorbent material comprises cellulosic cotton wool.
Claim 7
Dependent Claim
24 words
A sanitary napkin according to claim 1, in which the main absorbent pad is formed by compacting sheets of cotton and sheets of rayon.
Claim 8
Dependent Claim
31 words
A sanitary napkin according to claim 1, in which the outer film is provided on its outer surface with at least one double-face adhesive element provided with a removable protective film.
Claim 9
Dependent Claim
28 words
A sanitary napkin according to claim 1, in which the absorbent structure further comprises a secondary absorbent pad imprisoned between the main absorbent pad and the inner covering.
Claim 10
Dependent Claim
20 words
A sanitary napkin according to claim 8, in which the secondary absorbent pad comprises a sheet of an absorbent material.
Claim 11
Dependent Claim
21 words
A sanitary napkin according to claim 1, in which the secondary absorbent pad is less compact than the main absorbent pad.
Claim 12
Dependent Claim
18 words
A sanitary napkin according to claim 8, wherein the said absorbent material comprises random fibers of absorbent 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) | 1983-01-21 | 1983-07-23 | 1984-01-22 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1987-01-21 | 1987-07-23 | 1988-01-22 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1991-01-21 | 1991-07-23 | 1992-01-22 | $7700.00 | Window Closed / Lapsed |