US4921741A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Recreation surface and tile fastening scheme
Assignee: Dodge-Regupol Inc
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Filing: 1988-06-21
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Granted: 1990-05-01
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Expires: 2008-06-21
Abstract
Abstract The present invention is directed to a recreation surface which consists of a plurality of resilient, liquid-porous tiles adhered to a liquid-porous sheet that overlies a porous sub-surface and is anchored to the ground. In this way, the tiles are fixed and displacement or removal thereof is inhibited; additionally the porous tiles and sheet facilitate drainage of water from the recreation surface into the porous subsurface.
Inventors
- 👤 Paul A. Mullen
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-06 15:24
CPC Classifications
B; B32; B32B; B32B3/00; B32B3/10; B32B3/14; B32B3/16; E; E01; E01C; E01C13/00; E01C13/04; E01C13/045; B32B2305/00; B32B2305/02; B32B2305/026; B32B2307/00; B32B2307/50; B32B2307/558; B32B2307/56; B32B2419/00; B32B2419/04; Y; Y10; Y10T; Y10T428/00; Y10T428/16; Y10T428/163; Y10T428/164; Y10T428/24; Y10T428/24479; Y10T428/24612; Y10T428/24744
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
84 words
A recreation surface comprising: a liquid-porous sheet having an upper and lower surface; a plurality of liquid-porous resilient tiles, each said tile having a substantially uniform overall thickness, as measured in the vertical direction, and defined by upper and lower surfaces and front, rear, right and left side edge surfaces, said liquid-porous tiles and said liquid-porous sheet promote drainage to avoid accumulation of water on said upper surface of said tiles; and adhesive means securing said tiles to said sheet in edge-to-edge, abutting relationship.
Claim 2
Dependent Claim
84 words
A recreation surface comprising: a liquid-porous sheet having an upper and lower surface; a plurality of liquid-porous resilient tiles, each said tile having a substantially uniform overall thickness, as measured in the vertical direction, and defined by upper and lower surfaces and front, rear, right and left side edge surfaces, said liquid-porous tiles and said liquid-porous sheet promote drainage to avoid accumulation of water on said upper surface of said tiles; and adhesive means securing said tiles to said sheet in edge-to-edge, abutting relationship.
Claim 3
Dependent Claim
20 words
A recreation surface as in claim 1 further comprising means for anchoring the edges of said sheet to the ground.
Claim 4
Dependent Claim
18 words
A recreation surface as in claim 1 wherein said liquid-porous sheet is laid over a bed of sand.
Claim 5
Dependent Claim
64 words
A recreation surface as in claim 3 wherein each said resilient tile has a plurality of cores which extend vertically from said lower surface a distance less than the thickness of said tile for increasing the resiliency of said tile and wherein said liquid-porous sheet permits liquid drainage while preventing said sand from packing into said cores and decreasing the resiliency of said tile.
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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) | 1993-04-30 | 1993-10-30 | 1994-05-01 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-04-30 | 1997-10-30 | 1998-05-01 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-04-30 | 2001-10-30 | 2002-05-01 | $7700.00 | Window Closed / Lapsed |