US4596568A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Diaper cover
Assignee: LAMMA PRODUCTS A LP
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Filing: 1984-10-22
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Granted: 1986-06-24
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Expires: 2004-10-22
Abstract
Abstract The present invention is a novel diaper cover which contains a multiplicity of different layers of specific material to provide the essential functions of being essentially nonpermeable to liquid but permeable to air. The diaper cover also provides means to hold and close the diaper without extra diaper closing means.
Inventors
- 👤 Rachael Flug
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-04 03:43
CPC Classifications
A; A41; A41B; A41B13/00; A41B13/04
Claims Analysis
Total Claims: 18
Claim 1
Independent Claim
94 words
A diaper cover comprising: a. an innermost layer of mesh-like fabric material which includes a grid of porous fabric containing a multiplicity of fine openings and a grid pattern of larger openings interspersed throughout the porous fabric; b. a second layer of foam-like material located behind said layer of mesh-like fabric material, and possessing properties which permit it to be essentially nonpermeable to liquid but permeable to air; and c. a third or outermost layer of porous mesh-like material located behind said layer of foam-line material, which contains a multiplicity of very fine openings.
Claim 2
Dependent Claim
94 words
A diaper cover comprising: a. an innermost layer of mesh-like fabric material which includes a grid of porous fabric containing a multiplicity of fine openings and a grid pattern of larger openings interspersed throughout the porous fabric; b. a second layer of foam-like material located behind said layer of mesh-like fabric material, and possessing properties which permit it to be essentially nonpermeable to liquid but permeable to air; and c. a third or outermost layer of porous mesh-like material located behind said layer of foam-line material, which contains a multiplicity of very fine openings.
Claim 3
Dependent Claim
17 words
The invention as defined in claim 1 wherein said second layer of foam-like material is polyvinyl chloride.
Claim 4
Dependent Claim
16 words
The invention as defined in claim 1 wherein said second layer of foam-like material is polyethylene.
Claim 5
Dependent Claim
19 words
The invention as defined in claim 1 wherein said innermost layer of mesh-like fabric material is made of nylon.
Claim 6
Dependent Claim
19 words
The invention as defined in claim 1 wherein said outermost layer of porous mesh-like material is made of nylon.
Claim 7
Dependent Claim
39 words
The invention as defined in claim 1 wherein said second layer of foam-like material is made of polyvinyl chloride which is approximately 0.043 inches thick and consists of a foam packing density of approximately 7.52 pounds per cubic foot.
Claim 8
Dependent Claim
38 words
The invention as defined in claim 1 wherein said second layer of foam-like material is made of polyethylene which is approximately 0.043 inches thick and consists of a foam packing density of approximately 3.00 pounds per cubic foot.
Claim 9
Dependent Claim
51 words
The invention as defined in claim 1 wherein said second layer of foam-like material is made of polyvinyl chloride which is between a range of thicknesses from approximately 0.043 inches to approximately 0.070 inches and consists of a foam packing density equal to or greater than 7.52 pounds per cubic foot.
Claim 10
Dependent Claim
50 words
The invention as defined in claim 1 wherein said second layer of foam-like material is made of polyethylene which is between a range of thicknesses from approximately 0.043 inches to approximately 0.700 inches and consists of a foam packaging density equal to or greater than 3.00 pounds per cubic foot.
Claim 11
Dependent Claim
16 words
The invention as defined in claim 2 wherein said polyvinyl chloride has a closed celled structure.
Claim 12
Dependent Claim
15 words
The invention as defined in claim 3 wherein said polyethylene has a closed cell structure.
Claim 13
Dependent Claim
16 words
The invention as defined in claim 8 wherein said polyvinyl chloride has a closed cell structure.
Claim 14
Dependent Claim
15 words
The invention as defined in claim 9 wherein said polyethylene has a closed cell structure.
Claim 15
Dependent Claim
60 words
The invention as defined in claim 1 wherein said diaper cover further comprises a multiplicity of straps located on said innermost layer of mesh-like fabric material and adjacent to the extremities of the diaper cover so that a respective strap can accomodate a respective one of the corners of the diaper which is inserted into and held by the strap.
Claim 16
Dependent Claim
95 words
The invention as defined in claim 1 further comprising: a. a pair of male Velcro closing members located on said innermost layer of mesh like fabric and wherein a respective one of the pair of male Velcro members is located adjacent to an edge of the diaper cover, and b. a female Velcro like member located on said third outmost layer of porous mesh like material and at the opposite edge of the diaper cover; c. whereby the diaper cover may be closed by closing the male Velcro members onto the female Velcro like member.
Claim 17
Dependent Claim
18 words
The invention as defined in claim 15 wherein said female Velcro like member is a continuous loop surface.
Claim 18
Dependent Claim
18 words
The invention as defined in claim 15 wherein the female Velcro like member is a brushed nylon surface.
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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) | 1989-06-23 | 1989-12-23 | 1990-06-24 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1993-06-23 | 1993-12-23 | 1994-06-24 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1997-06-23 | 1997-12-23 | 1998-06-24 | $7700.00 | Window Closed / Lapsed |