Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 2, 2008
Patent Application Number
11717513
Date Filed
March 12, 2007
Patent Citations Received
0
0
Patent Primary Examiner
Patent abstract
A continuous curve arch shape cross section leaching chamber made of molded thermoplastic has closely spaced corrugations and sidewalls, portions of which are perforated with horizontal slots. Either or both of the slot height and the local wall thickness which defines the slots may vary with slot elevation from the base, so that a perforated sidewall configuration is achieved which resists entry of surrounding soil.
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