Patent US4516572A successfully refreshed from Google Patents.
US4516572A
Expired / Lapsed
US
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Perforated closed cell padding material
Assignee: Individual
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Filing: 1983-03-11
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Granted: 1985-05-14
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Expires: 2003-03-11
Abstract
Abstract Perforated closed cell polyvinyl chloride foam padding material useful with an immobilizing orthopedic cast, said material being capable of transporting moisture along the surface thereof in contact with the human skin and of passing moisture such as water and perspiration from the human skin therethrough by vapor transmission, and being conformable and elastic in the longitudinal direction of the padding material.
Inventors
- 👤 Allen P. Schlein
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-23 22:17
CPC Classifications
A; A61; A61F; A61F13/00; A61F13/04; A61F13/041; A61L; A61L15/00; A61L15/07; A61L15/12; A61F2013/00089; A61F2013/00119; A61F2013/00246; A61F2013/00251; A61F2013/00361; A61F2013/00727; A61F2013/00731; A61F2013/0074; A61F2013/00855; A61F2013/00859; A61F13/15; A61F13/53; A61F2013/530802; A61F13/534; A61F13/537; A61F2013/53765; A61F2013/53782
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
104 words
A padding material for an immobilizing orthopedic cast, said padding material consisting essentially of closed cell polyvinyl chloride foam in strip sheet form having a density as high as possible consistent with rendering said padding material conformable, resiliently compressible and elastic in the longitudinal direction, said foam being water repellent at least to the extent that water penetrates the foam with difficuly and the sheet surface which engages the human skin being macroscopically smooth and having the property of transporting moisture therealong, said foam material having perforations capable of passing moisture such as water and perspiration from the human skin therethrough by vapor transmission.
Claim 2
Dependent Claim
104 words
A padding material for an immobilizing orthopedic cast, said padding material consisting essentially of closed cell polyvinyl chloride foam in strip sheet form having a density as high as possible consistent with rendering said padding material conformable, resiliently compressible and elastic in the longitudinal direction, said foam being water repellent at least to the extent that water penetrates the foam with difficuly and the sheet surface which engages the human skin being macroscopically smooth and having the property of transporting moisture therealong, said foam material having perforations capable of passing moisture such as water and perspiration from the human skin therethrough by vapor transmission.
Claim 3
Dependent Claim
27 words
The padding material of claim 1, wherein the density of said foam material is in the range between about 6 pounds and 24 pounds per cubic yard.
Claim 4
Dependent Claim
59 words
The padding material of claim 1, wherein said perforations, when said padding material is in a relaxed state, are circular perforations arranged in spaced apart rows extending along the longitudinal dimension of and generally parallel to the side edges of the strip of padding material which become oval in shape when said strip is stretched in the longitudinal direction.
Claim 5
Dependent Claim
56 words
The padding material of claim 3, wherein the perforations in the columns closest respective side edges of the strip of padding material have equal diameters smaller than the diameter of others of the perforations in the padding material and are spaced apart in the longitudinal direction about twice the longitudinal spacing of the said other perforations.
Claim 6
Dependent Claim
26 words
The padding material of claim 3, wherein said perforations have two different diameters, the area one of which is about twice the area of the other.
Claim 7
Dependent Claim
25 words
The padding material of claim 4, wherein the area of the said others of the perforations is about twice the area of the smaller perforations.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1988-05-13 | 1988-11-12 | 1989-05-14 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-05-13 | 1992-11-12 | 1993-05-14 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-05-13 | 1996-11-12 | 1997-05-14 | $7700.00 | Window Closed / Lapsed |