Drainage element

Details Drainage element Drainage element

2011-04-26

2011-04-26

Bagnell, David J (Department: 3672)

Hydraulic and earth engineering

Drainage or irrigation

Porous or apertured pipe, flume, or tileway

C405S036000, C383S001000, C383S117000

Reexamination Certificate

active

07931423

ABSTRACT:
A preassembled drainage line element is fabricated at least in part of a biodegradable material, such as kraft paper or a plastic film. The biodegradable material may be perforated to impart a characteristic of water permeability to the material.

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patent: 2004/0022973 (2004-02-01), Bussey et al.
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patent: 2006/0280557 (2006-12-01), Ring et al.
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