A protective mat for the pavement area surrounding an open manhole comprises a bottom layer of petroleum and contamination impervious preferably polyethylene sheet material laminated to an upper fibrous mat sheet layer preferably comprising cotton fibers bonded together to form a porous liquid absorbent layer.

Una estera protectora para el área del pavimento que rodea una boca abierta abarca una capa inferior del material impermeable de la hoja del petróleo y del polietileno de la contaminación preferiblemente laminado a una capa mat fibrosa superior de la hoja que abarca preferiblemente las fibras del algodón enlazadas juntas para formar una capa absorbente líquida porosa.

 
Web www.patentalert.com

< Portable cofferdam and method for stabilizing the structural integrity of box culvert bridges

< Portable irrigation pipe installation and removal system

> Method and apparatus for monitoring hydroelectric facility maintenance and environmental costs

> Composite buoyancy module

~ 00052