Title: Playing surface for athletic games

Abstract: A playing surface for athletic games, such as tennis, comprising a flat, firm subsurface, a pile fabric disposed on the subsurface comprising a relatively flexible, moisture-impermeable backing and normally generally upstanding pile elements resembling grass, a compacted layer of granular mineral material disposed among the pile elements on the backing to a depth from about 75% to substantially equal to the length of the pile elements, the mineral layer comprising less than 10% clay and further comprising a quantity of moisture retaining material sufficient to maintain the moisture content of the mineral layer above about 3% by weight under normal climatic conditions.

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Other info:

Inventors: Haas, Jr., Frederick T. (Metairie, LA, US)

Application Number: 632970
Filing Date: 1975-11-18
Publication_date: 1977-08-23
Assignee: MOD-SOD Sport Surfaces (Metairie, LA)
Primary Class(es): 428/17 428/87, 428/95, 428/331, 472/92, 473/490
Other Classes:
US Patent Ref:

3157557	Nov, 1964	Palmer	428/17.
3332828	Jul, 1967	Faria	428/17.
3661687	May, 1972	Spinney	428/17.
3740303	Jun, 1973	Alderson	428/17.
3900656	Aug, 1975	Schmidt	428/95.

Other Refs:
Primary Examiner: McCamish, Marion E.
Assistant Examiner:
Attorney: Schuyler, Birch, Swindler, McKie & Beckett