Patent US3682476A successfully refreshed from Google Patents.
US3682476A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Convertible athletic field
Assignee: Astroturf Industries Inc
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Filing: 1969-12-04
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Granted: 1972-08-08
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Expires: 1989-12-04
Abstract
Abstract An athletic field having a synthetic turf surface is provided. The surface contains at least one opening in which is located a container filled with dirt or similar material packed to provide a surface substantially level with the base of the synthetic turf. These openings with the dirt filled containers provide an area on the synthetic turf covered field for sliding during sporting events in which sliding is required, for example, broad jumping, baseball, and the like. The openings and containers may be of various shapes, depending on the desired use.
Inventors
- 👤 George C Kempson
- 👤 Arthur N Gilbert
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-01 17:44
CPC Classifications
E; E01; E01C; E01C13/00; E01C13/08
Claims Analysis
Total Claims: 3
Claim 1
Independent Claim
140 words
A convertible athletic field comprising a support surface, a synthetic turf mounted on said support surface, said synthetic turf having a base being adjacent said support surface and blade elements connected to and extending upwardly from said base, said support surface and said synthetic turf having coextensive openings defining a cavity and a container having a bottom plate, sides extending upwardly from said bottom plate, an energy absorbing foam guarD mounted on the top of said sides and extending over to the outside thereof and a dirt composition filling said container and being level with the upper portions of said foam guard; said container being removably inserted into said cavity with said energy absorbing foam guard fitting snugly against said synthetic turf, said dirt composition and said foam guard being a level extension of the base of said synthetic turf.
Claim 2
Dependent Claim
140 words
A convertible athletic field comprising a support surface, a synthetic turf mounted on said support surface, said synthetic turf having a base being adjacent said support surface and blade elements connected to and extending upwardly from said base, said support surface and said synthetic turf having coextensive openings defining a cavity and a container having a bottom plate, sides extending upwardly from said bottom plate, an energy absorbing foam guarD mounted on the top of said sides and extending over to the outside thereof and a dirt composition filling said container and being level with the upper portions of said foam guard; said container being removably inserted into said cavity with said energy absorbing foam guard fitting snugly against said synthetic turf, said dirt composition and said foam guard being a level extension of the base of said synthetic turf.
Claim 3
Dependent Claim
20 words
The convertible athletic field of claim 1 wherein said container bottom plate is provided with openings to allow for drainage.
References Cited (Backward Citations)
US3343843A
Cited
US3323802A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1975-08-08 | 1976-02-07 | 1976-08-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1979-08-08 | 1980-02-07 | 1980-08-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1983-08-08 | 1984-02-07 | 1984-08-08 | $7700.00 | Window Closed / Lapsed |