Patent US3771525A successfully refreshed from Google Patents.
US3771525A
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US
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Sanitary napkin having compressed core
Assignee: Ruby Ets SA
•
Filing: 1971-12-17
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Granted: 1973-11-13
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Expires: 1991-12-17
Abstract
Abstract Sanitary napkin comprises flexible absorbent mass surrounding core of compressed hydrophilic fibers.
Inventors
- 👤 R Chapuis
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-22 19:32
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/534; A61F13/53409; A61F13/53418; A61F13/51; A61F13/514; A61F13/51401; A61F13/51405; A61L; A61L15/00; A61L15/16; A61L15/22; A61L15/28; A61F2013/51441; A61F2013/51443; A61F2013/530131; A61F2013/530437
Claims Analysis
Total Claims: 6
Claim 1
Independent Claim
38 words
Napkin as claimed in claim 1 in which the internal mass (3) of hydrophilic cotton is formed from a single folded layer having abutting edges (5) so that the core (4) is completely covered by this internal mass.
Claim 2
Dependent Claim
14 words
Sanitary napkin as claimed in claim 1 in the shape of a thin parllelopiped.
Claim 3
Dependent Claim
24 words
Napkin as claimed in claim 1 in which the core of compressed hydrophilic fibers is made from fibers obtained from ground, compressed wood pulp.
Claim 4
Dependent Claim
23 words
Napkin as claimed in claim 1 in which the fibers of the core are compressed at a pressure between 900 and 1,200 bars.
Claim 5
Dependent Claim
24 words
Napkin as claimed in claim 1 in which the absorbent mass is formed into a layer which is folded to cover the compressed core.
Claim 6
Dependent Claim
26 words
Napkin as claimed in claim 1 in which the absorbent mass surrounding the compressed core is located inside a mesh made of cotton or polyamide thread.
References Cited (Backward Citations)
US2024976A
Cited
US2328795A
Cited
US3208451A
Cited
US3494362A
Cited
DE2028627A1
Cited
US3669114A
Cited
US3683917A
Cited
US3667468A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-11-12 | 1977-05-14 | 1977-11-13 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-11-12 | 1981-05-14 | 1981-11-13 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-11-12 | 1985-05-14 | 1985-11-13 | $7700.00 | Window Closed / Lapsed |