US4624666A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Channeled napkin with dry cover
Assignee: Personal Products Co
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Filing: 1984-07-20
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Granted: 1986-11-25
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Expires: 2004-07-20
Abstract
Abstract A sanitary napkin is provided which comprises a cover with clean and dry properties in combination with the fluid transport properties of an impressed channel. The napkin comprises an absorbent core having impressed into its body facing side at least one elongated channel. A hydrophobic, body fluid pervious, cover overlies said body facing side and said channel and said cover extends into the channel and is adhered to the channel bottom.
Inventors
- 👤 Edmund Z. DeRossett
- 👤 Frederick F. Gentzel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 09:14
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/15; A61F13/53; A61F13/531; A61F13/532; A61F13/533; A61F13/51; A61F13/511; A61F13/51104; A61F13/51108; A61F13/513; A61F13/51305; A61F13/539; A61F13/534; A61F13/537; A61F2013/51078; A61F13/514; A61F13/51401; A61F2013/51409; A61F2013/530131; A61F2013/53445; A61F2013/53765; A61F2013/53782; A61F2013/53908; A61F2013/5395
Claims Analysis
Total Claims: 16
Claim 1
Independent Claim
104 words
A sanitary napkin comprising an elongated absorbent core having a body facing side and a garment facing side; said absorbent core having impressed into the body facing side at least one elongated channel having walls and a bottom; said napkin having a hydrophobic body fluid pervious cover comprising a continuous film of hydrophobic polymeric material rendered permeable to body fluid by being provided with apertures; said fluid pervious cover overlying said body facing side of said absorbent core including its impressed channel; said cover extending into said channel and being adhered to said channel bottom and unadhered to the remainder of said absorbent core.
Claim 2
Dependent Claim
104 words
A sanitary napkin comprising an elongated absorbent core having a body facing side and a garment facing side; said absorbent core having impressed into the body facing side at least one elongated channel having walls and a bottom; said napkin having a hydrophobic body fluid pervious cover comprising a continuous film of hydrophobic polymeric material rendered permeable to body fluid by being provided with apertures; said fluid pervious cover overlying said body facing side of said absorbent core including its impressed channel; said cover extending into said channel and being adhered to said channel bottom and unadhered to the remainder of said absorbent core.
Claim 3
Dependent Claim
22 words
The napkin of claim 1 wherein said cover comprises thermoplastic material and is adhered to said channel bottom by auto heat bonding.
Claim 4
Dependent Claim
40 words
The napkin of claim 2 wherein said cover comprises polyethylene and is heat bonded to said channel bottom by a male member having a maximum temperature of between 290° and 300° F. and applied for no more than 0.4 seconds.
Claim 5
Dependent Claim
18 words
The napkin of claim 1 wherein said cover is adhesively bonded to said channel bottom with an adhesive.
Claim 6
Dependent Claim
12 words
The napkin of claim 4 wherein said adhesive is an emulsion adhesive.
Claim 7
Dependent Claim
13 words
The napkin of claim 4 wherein said adhesive is a hot melt adhesive.
Claim 8
Dependent Claim
28 words
The napkin of claim 6 wherein said hot melt adhesive is adhesively active at a temperature at least 2° F. below the initial melting point of the cover.
Claim 9
Dependent Claim
28 words
The napkin of claim 7 wherein said hot melt adhesive is adhesively active at a temperature at least 4° F. below the initial melting point of the cover.
Claim 10
Dependent Claim
23 words
The napkin of claim 8 wherein said cover comprises polyethylene and said hot melt is adhesively active at a temperature below 258° F.
Claim 11
Dependent Claim
18 words
The napkin of claim 9 wherein said hot melt is adhesively active at a temperature below 256° F.
Claim 12
Dependent Claim
25 words
The napkin of claim 4 wherein said adhesive is present in the quantity of at least 0.001 grams of adhesive per linear inch of channel.
Claim 13
Dependent Claim
25 words
The napkin of claim 11 wherein said adhesive is present in the quantity of at least 0.0015 grams of adhesive per linear inch of channel.
Claim 14
Dependent Claim
25 words
The napkin of claim 11 wherein said adhesive is present in the quantity of less than 0.01 grams of adhesive per linear inch of channel.
Claim 15
Dependent Claim
26 words
The napkin of claim 1 wherein said channel extends longitudinally with said napkin for a length of at least 10% of the length of said core.
Claim 16
Dependent Claim
26 words
The napkin of claim 14 wherein said channel extends longitudinally with said napkin for a length of at least 25% of the length of said core.
References Cited (Backward Citations)
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Cited
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Cited
US4443512A
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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) | 1989-11-24 | 1990-05-26 | 1990-11-25 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-11-24 | 1994-05-26 | 1994-11-25 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-11-24 | 1998-05-26 | 1998-11-25 | $7700.00 | Window Closed / Lapsed |