US3736931A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Catamenial napkin
Assignee: Individual
•
Filing: 1971-06-09
•
Granted: 1973-06-05
•
Expires: 1991-06-09
Abstract
Abstract A catamenial napkin having an outer non-compressed layer of fluid absorbent material and an inner core of highly compressed fluid absorbent material enclosed therein. The napkin preferably is V-shaped in cross section and is arch-shaped in its longitudinal direction by die compression. When the inner core is wetted, it swells and dynamically expands the outer noncompressed layer in all directions and thereby adjusts itself to each wearer.
Inventors
- 👤 J Glassman
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-24 05:36
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/45; A61F13/47; A61F13/472; A61F13/47218; A61F13/53; A61F13/534; A61F13/537; A61F13/53704; A61F13/51; A61F13/511; A61F13/531; A61F13/532; A61F13/533; A61F13/56; A61F13/64; A61F2013/4729; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530131; A61F2013/530437; A61F2013/530445; A61F2013/53445; A61F2013/53765; A61F2013/53782; A61F2013/5694
Claims Analysis
Total Claims: 9
Claim 1
Independent Claim
75 words
A sanitary napkin comprising an outer substantially rectangular layer of soft moisture absorbent material, a substantially rectangular layer of highly compressed moisture absorbent material arranged on one face of the outer layer, said compressed layer being substantially smaller than the outer layer, and the margins of the outer layer being disposed to overly the margins of the layer of highly compressed absorbent material to thereby leave a small area of the compressed inner layer exposed.
Claim 2
Dependent Claim
75 words
A sanitary napkin comprising an outer substantially rectangular layer of soft moisture absorbent material, a substantially rectangular layer of highly compressed moisture absorbent material arranged on one face of the outer layer, said compressed layer being substantially smaller than the outer layer, and the margins of the outer layer being disposed to overly the margins of the layer of highly compressed absorbent material to thereby leave a small area of the compressed inner layer exposed.
Claim 3
Dependent Claim
44 words
The napkin recited in claim 1, in which the napkin is formed substantially triangular in shape in cross-section so that said highly compressed layer upon being wetted will expand and forcefully spread the sides of the outer layer apart into a substantially wide V-shape.
Claim 4
Dependent Claim
39 words
The napkin recited in claim 1, in which the napkin is sharply curved in a longitudinal direction and the small exposed area of; the compressed layer is located; on the concave side of The napkin along its longitudinal axis.
Claim 5
Independent Claim
62 words
The method of fabricating a sanitary napkin comprised of an outer layer of soft fluid absorbent material and an inner core of highly compressed fluid absorbent material smaller in size than the outer layer, said method consisting of forming the napkin into a longitudinal V-shape and folding the longitudinal margins of the outer layer over the inner core to substantially conceal same.
Claim 6
Independent Claim
62 words
The method of fabricating a sanitary napkin comprised of an outer layer of soft fluid absorbent material and an inner core of highly compressed fluid absorbent material smaller in size than the outer layer, said method consisting of forming the napkin into a longitudinal V-shape and folding the longitudinal margins of the outer layer over the inner core to substantially conceal same.
Claim 7
Dependent Claim
31 words
The method recited in claim 4 with the added step of arching the napkin in a longitudinal direction with the exposed areas of the inner core visible on the concave surface.
Claim 8
Dependent Claim
24 words
The method recited in claim 4, with the added step of arranging a layer of moisture impervious material between said inner and outer layers.
Claim 9
Dependent Claim
26 words
The method recited in claim 4, with the added step of arranging a layer of moisture impervious material over the exposed face of the outer layer.
References Cited (Backward Citations)
US1843037A
Cited
US2952259A
Cited
US2964040A
Cited
US3364931A
Cited
US3375827A
Cited
US3411504A
Cited
US3430630A
Cited
US3570493A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1976-06-04 | 1976-12-04 | 1977-06-05 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1980-06-04 | 1980-12-04 | 1981-06-05 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1984-06-04 | 1984-12-04 | 1985-06-05 | $7700.00 | Window Closed / Lapsed |