Ground covering for athletic and playing areas

Claim 1

GROUND COVERING FOR ATHLETIC AND PLAYING AREAS APPLIED OVER AND SUPPORTED ON A PREPARED GRANULAR BASE, SAID COVERING COMPRISING: (A) COARSE SAND, THE MAJOR PORTION OF WHICH HAS A MESH BETWEEN NO. 4 AND NO. 30, SO THAT IT WILL NOT PACK OR BLOW AND WILL ALLOW WATER TO DRAIN THERETHROUGH; (B) PLANER MILL CUTTINGS OF WOOD SHAVINGS TO FORM A SPRINGY BASE; (C) AN OIL-BASE PRODUCT OF THIN LIQUID HAVING DEEP PENETRATING QUALITIES TO HOLD THE SAND AND MILL CUTTINGS TOGETHER KEEPING THEM FOR BLOWING, THE OILBASE PRODUCT CONSISTING OF A MINERAL OIL FREE OF ASPHALT; (D) THE OIL-BASE PRODUCT BEING CHARACTERIZED IN ITS PROPERTIES APPROXIMATELY AS FOLLOWS: (1) SPECIFIC GRAVITY: API (AMERICAN PETROLEUM INSTITUTE MEASUREMENT) 26; (2) FLASH POINT: AT 0*F. EQUALS COC (CLEVELAND OPEN CUP) 355*F., THE FLASH POINT BEING THE LOWEST TEMPERATURE AT WHICH THE VAPOR WILL IGNITE; (3) VISCOSITY: SSU (SAYBOLT SECONDS UNIVERSAL) AT 100*F. EQUALS 106 SECONDS TIME THE OIL TAKES TO FLOW TO COMPLETE THE TEST; (4) POUR POINT: -45*F., THE POUT POINT BEING THE LOWEST TEMPERATURE AT WHICH THE OIL WILL POUR OR FLOW BEFORE BECOMING A SOLID; (5) COLOR: EXTRA PALE; (E) THE SAND, MILL CUTTINGS AND OIL-BASE PRODUCT BEING THROUGHLY MIXED TOGETHER.