Is a
Patent attributes
Patent Jurisdiction
Patent Number
Date of Patent
September 2, 2008
Patent Application Number
11018148
Date Filed
December 20, 2004
Patent Citations Received
Patent Primary Examiner
Patent abstract
A molded plastic corrugated arch shape cross section leaching chamber has a dome end for forming a pivotable joint with a like chamber. The dome of the dome end has one or more preferably trapezoid shape shallow surface depressions, for strength. The depressions are specially placed so that soil cannot enter the interior of the chambers, regardless of the angle between the chambers.
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