US4172168A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Lay-flat flooring slab
Assignee: SEKISUI (EUROPE) AG BAARERSTRASSE 10 CH - 6300 ZUG SWITZERLAND
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Filing: 1978-06-23
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Granted: 1979-10-23
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Expires: 1998-06-23
Abstract
Abstract A flat floor tile or slab, especially for use outdoors, comprising a bottom layer of a closed-cell soft foam having openings geometrically distributed over its area and, bonded thereto, a water-permeable covering layer of resiliently cemented-together granules. Advantageously the tile is provided on its periphery with projections and corresponding recesses, whereby said slab can be interlocked with adjacent slabs. The openings in the tile are formed by slits of about 25 mm arranged in parallel straight lines, slits in each line being spaced about 6 mm apart and adjacent lines being spaced less than about 8 mm from one another, the bottom layer comprising a polyethylene foam of a density of about 90 Kp/m 3 and a thickness of about 10 mm, the covering layer being about 7 mm thick and comprising irregularly structured granules of an average diameter of about 1 to 5 mm and comprising a mixture of mineral particles and rubber particles.
Inventors
- 👤 Friedemann Klaffke
- 👤 Klaus Heckel
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 08:47
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/26; B32B3/266; B32B3/30; B32B5/00; B32B5/18; B32B5/22; B32B5/30; E; E01; E01C; E01C13/00; E01C13/04; E01C13/045; E04; E04F; E04F15/00; E04F15/02; E04F15/10; E04F15/22; B32B2264/00; B32B2264/02; B32B2264/0207; B32B2266/00; B32B2266/02; B32B2266/0214; B32B2266/025; B32B2266/08; B32B2307/00; B32B2307/70; B32B2307/726; B32B2419/00; B32B2419/04; Y; Y10; Y10T; Y10T428/00; Y10T428/23907; Y10T428/23979; Y10T428/24; Y10T428/24273; Y10T428/24322; Y10T428/24331; Y10T428/24355; Y10T428/24372; Y10T428/24471; Y10T428/24942; Y10T428/2495; Y10T428/24967; Y10T428/249921; Y10T428/249953; Y10T428/249976; Y10T428/249977; Y10T428/25; Y10T428/254
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
51 words
A lay-flat flooring slab, especially for use outdoors, comprising a bottom layer of a closed-cell soft foam having openings geometrically distributed over its area and formed by slits which are expanded to openings by a transverse stretching and, bonded thereto, a water-permeable covering layer of resiliently cemented-together granules comprising rubber particles.
Claim 2
Dependent Claim
51 words
A lay-flat flooring slab, especially for use outdoors, comprising a bottom layer of a closed-cell soft foam having openings geometrically distributed over its area and formed by slits which are expanded to openings by a transverse stretching and, bonded thereto, a water-permeable covering layer of resiliently cemented-together granules comprising rubber particles.
Claim 3
Dependent Claim
26 words
A slab according to claim 1, wherein the slits are arranged in parallel straight lines, the slits of one line being staggered relative to adjacent lines.
Claim 4
Dependent Claim
28 words
A slab according to claim 2, wherein each slit and its spacing from adjacent slits within the same line ranges in length from about 10 to 30 mm.
Claim 5
Dependent Claim
20 words
A slab according to claim 2, wherein the distance between adjacent lines of slits is less than about 8 mm.
Claim 6
Dependent Claim
20 words
A slab according to claim 1, wherein the thickness of the bottom layer ranges from about 5 to 20 mm.
Claim 7
Dependent Claim
23 words
A slab according to claim 1, wherein the covering layer comprises irregularly structured granules of an average diameter of 1 to 5 mm.
Claim 8
Dependent Claim
18 words
A slab according to claim 6, wherein the granules comprise a mixture of mineral particles and rubber particles.
Claim 9
Dependent Claim
19 words
A slab according to claim 1, wherein the covering layer contains boundary markings defined by granules of different colors.
Claim 10
Dependent Claim
20 words
A slab according to claim 1, wherein the thickness of the covering layer ranges from about 2 to 15 mm.
Claim 11
Dependent Claim
27 words
A slab according to claim 1, provided on its periphery with undercut projections and corresponding recesses, whereby said slab can be interlocked with similarly constructed adjacent slabs.
Claim 12
Dependent Claim
100 words
A slab according to claim 10, wherein the openings are formed by slits of about 25 mm arranged in parallel straight lines, slits in each line being spaced about 6 mm apart and adjacent lines being spaced less than about 8 mm from one another, the bottom layer comprising a polyethylene foam of a density of about 90 kp/m 3 and a thickness of about 10 mm, the covering layer being about 7 mm thick and comprising irregularly structured granules of an average diameter of about 1 to 5 mm and comprising a mixture of mineral particles and rubber particles.
References Cited (Backward Citations)
GB1061702A
Cited
US3511743A
Cited
US3616029A
Cited
US3619343A
Cited
US3682739A
Cited
US3679539A
Cited
US3857749A
Cited
US3804699A
Cited
DE2258566A1
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1982-10-22 | 1983-04-23 | 1983-10-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1986-10-22 | 1987-04-23 | 1987-10-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1990-10-22 | 1991-04-23 | 1991-10-23 | $7700.00 | Window Closed / Lapsed |