US4731065A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Sanitary napkin
Assignee: Individual
•
Filing: 1985-10-18
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Granted: 1988-03-15
•
Expires: 2005-10-18
Abstract
Abstract A sanitary napkin for receiving excretions includes a flat, elongate water absorbing napkin body. That part of the napkin body which contacts the excretory organs is formed with a recess which serves as an excretion receiving space to enhance the absorptivity and to increase the capacity of the napkin. The napkin can be conveniently used to receive menstrual blood, urine or feces.
Inventors
- 👤 Yutaka Yamada
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 16:19
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/45; A61F13/47; A61F13/472; A61F13/49; A61F13/495; A61F13/51; A61F13/511; A61F13/53; A61F13/534; A61F13/537; A61F2013/53445; A61F13/53708; A61F2013/53721
Claims Analysis
Total Claims: 10
Claim 1
Independent Claim
193 words
A sanitary napkin for receiving bodily excretions, said sanitary napkin comprising an elongated, flexible, absorbent element having opposite front and rear surfaces which are smooth and elongated, said absorbent element comprising a lamination of a plurality of elongated water-absorbing paper layers which are rimpled in their elongate dimension, some of said elongated water-absorbing paper layers nearest said front surface of said absorbent element including portions which are folded back inwardly of said absorbent element so as to provide an excretion-receiving recess in said absorbent element extending from its front surface towards its rear surface and a generally C-shaped excretion-receiving passage space communicating with said recess, said generally C-shaped passage space having a generally triangular-shaped cross section, the capillaries between said water-absorbing paper layers communicating with said recess and said generally C-shaped passage space, and an elongated, waterproof bag element securely surrounding said absorbent element, said bag element having a front surface covering the front surface of said absorbent element and a rear surface covering the rear surface of said absorbent element, the front surface of said bag element including an opening which is in alignment with the recess in the absorbent element therein.
Claim 2
Dependent Claim
193 words
A sanitary napkin for receiving bodily excretions, said sanitary napkin comprising an elongated, flexible, absorbent element having opposite front and rear surfaces which are smooth and elongated, said absorbent element comprising a lamination of a plurality of elongated water-absorbing paper layers which are rimpled in their elongate dimension, some of said elongated water-absorbing paper layers nearest said front surface of said absorbent element including portions which are folded back inwardly of said absorbent element so as to provide an excretion-receiving recess in said absorbent element extending from its front surface towards its rear surface and a generally C-shaped excretion-receiving passage space communicating with said recess, said generally C-shaped passage space having a generally triangular-shaped cross section, the capillaries between said water-absorbing paper layers communicating with said recess and said generally C-shaped passage space, and an elongated, waterproof bag element securely surrounding said absorbent element, said bag element having a front surface covering the front surface of said absorbent element and a rear surface covering the rear surface of said absorbent element, the front surface of said bag element including an opening which is in alignment with the recess in the absorbent element therein.
Claim 3
Dependent Claim
28 words
A sanitary napkin as defined in claim 1, wherein said recess in said absorbent element is elongated and wherein said opening in said bag element is correspondingly elongated.
Claim 4
Dependent Claim
25 words
A sanitary napkin as defined in claim 2, wherein both said recess in said absorbent element and said opening in said bag element are elliptical.
Claim 5
Dependent Claim
27 words
A sanitary napkin as defined in claim 1, wherein said recess in said absorbent element is round and wherein said opening in said bag element is round.
Claim 6
Dependent Claim
29 words
A sanitary napkin as defined in claim 1, including a water-permeable membrane positioned between said absorbent element and said bag element to cover the recess in said absorbent element.
Claim 7
Dependent Claim
33 words
A sanitary napkin as defined in claim 1, wherein said bag element includes at least one adhesive means on the side of the front surface thereof which faces away from the absorbent element.
Claim 8
Dependent Claim
33 words
A sanitary napkin as defined in claim 1, wherein said bag element includes at least one adhesive means on the side of the rear surface thereof which faces away from the absorbent element.
Claim 9
Dependent Claim
241 words
A sanitary napkin for receiving bodily excretions, said sanitary napkin comprising an elongated, flexible, absorbent element having opposite front and rear surfaces which are smooth and elongated, said absorbent element comprising a lamination of a plurality of elongated water-absorbing paper layers which are rimpled in their elongated dimension, some of said elongated water-absorbing paper layers nearest said front surface of said absorbent element including portions which are folded back inwardly of said absorbent element so as to provide an excretion-receiving recess in said absorbent element extending from its front surface towards its rear surface and a generally C-shaped excretion-receiving passage space communicating with said recess, said generally C-shaped passage space having a generally triangular-shaped cross section, the capillaries between said water-absorbing paper layers communicating with said recess and said generally C-shaped passage space, an elongated, waterproof bag element securely surrounding said absorbent element, said bag element having a front surface covering the front surface of said absorbent element and a rear surface covering the rear surface of said absorbent element, the front surface of said bag element including an opening which is in alignment with the recess in the absorbent element therein, and an absorbent strip having opposite ends, one end of said absorbent strip being attached to the inwardly folded back portions of the water-absorbing paper layers which provide said excretion-receiving recess and said laterally-extending excretion-receiving passage spaces and other end being extendable through said opening in said bag element.
Claim 10
Dependent Claim
241 words
A sanitary napkin for receiving bodily excretions, said sanitary napkin comprising an elongated, flexible, absorbent element having opposite front and rear surfaces which are smooth and elongated, said absorbent element comprising a lamination of a plurality of elongated water-absorbing paper layers which are rimpled in their elongated dimension, some of said elongated water-absorbing paper layers nearest said front surface of said absorbent element including portions which are folded back inwardly of said absorbent element so as to provide an excretion-receiving recess in said absorbent element extending from its front surface towards its rear surface and a generally C-shaped excretion-receiving passage space communicating with said recess, said generally C-shaped passage space having a generally triangular-shaped cross section, the capillaries between said water-absorbing paper layers communicating with said recess and said generally C-shaped passage space, an elongated, waterproof bag element securely surrounding said absorbent element, said bag element having a front surface covering the front surface of said absorbent element and a rear surface covering the rear surface of said absorbent element, the front surface of said bag element including an opening which is in alignment with the recess in the absorbent element therein, and an absorbent strip having opposite ends, one end of said absorbent strip being attached to the inwardly folded back portions of the water-absorbing paper layers which provide said excretion-receiving recess and said laterally-extending excretion-receiving passage spaces and other end being extendable through said opening in said bag element.
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USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1991-03-15 | 1991-09-14 | 1992-03-15 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1995-03-15 | 1995-09-14 | 1996-03-15 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1999-03-15 | 1999-09-14 | 2000-03-15 | $7700.00 | Window Closed / Lapsed |