Apparatus for making drainage element with a periphery of...

Details Apparatus for making drainage element with a periphery of... Apparatus for making drainage element with a periphery of...

2008-12-04

2011-11-22

Cozart, Jermie (Department: 3726)

Metal working

Means to assemble or disassemble

Running-length work

C029S820000, C029S896620, C029S525010

Reexamination Certificate

active

08061020

ABSTRACT:
The drainage element is made with a periphery formed of a filter material that allows the passage of water and prevents the passage of soil and a second peripheral section of net material that allows the passage of water while the preventing the passage of the lightweight aggregate therein. The filter material is preferably made of spun bonded polyester and may be made of a biodegradable material such as starch.

REFERENCES:
patent: 4104774 (1978-08-01), Overmyer et al.
patent: 5051028 (1991-09-01), Houck et al.
patent: 6497031 (2002-12-01), Houck et al.
patent: 6854924 (2005-02-01), Ring
patent: 7178224 (2007-02-01), Bussey et al.
patent: 2003/0097827 (2003-05-01), Bussey et al.
patent: 2006/0075619 (2006-04-01), Bussey et al.

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