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| Number | Title | Issue Date |
| 8002497 | Coupler for leaching chamber systems An adjustable coupler is disclosed for interconnecting leaching chambers to create a serpentine pathway for a leaching field. A coupler can connect a first leaching chamber and a second leaching chamber. The coupler can comprise a mating feature and an adjustment fe... | 08/23/2011 |
| 7413382 | Coupler for leaching chamber systems An adjustable coupler is disclosed for interconnecting leaching chambers to create a serpentine pathway for a leaching field. A coupler can connect a first leaching chamber and a second leaching chamber. The coupler can comprise a mating feature and an adjustment fe... | 08/19/2008 |
| 7331582 | Gasket An annular gasket for affecting a watertight seal between two sections of corrugated pipe. The gasket comprises a seating portion dimensioned to fit within an annular recess in one of the mated sections of corrugated pipe, and a sealing portion integrally molded wit... | 02/19/2008 |
| 7306264 | Pipe having a water-tight in-line bell In a corrugated pipe comprising two sections joined by telescopically mating a male end of one section with a female end of the other section, an annular sealing element is fixed to the exterior surface of the male end and disposed to sealingly engage the interior s... | 12/11/2007 |
| 7160059 | Adjustable angle coupler for leaching chamber systems An adjustable coupler is disclosed for interconnecting leaching chambers to create a serpentine pathway for a leaching field. A coupler can connect a first leaching chamber and a second leaching chamber. The coupler can comprise a mating feature and an adjustment fe... | 01/09/2007 |
| 6948718 | Gasket An annular gasket for affecting a watertight seal between two sections of corrugated pipe. The gasket comprises a seating portion dimensioned to fit within an annular recess in one of the mated sections of corrugated pipe, and a sealing portion integrally molded wit... | 09/27/2005 |
| 6592293 | Adjustable angle coupler for leaching chamber systems An adjustable coupler interconnects leaching chambers to create a serpentine pathway for a leaching field. The coupler can comprise a mating feature, which can be used to mate the coupler between a first leaching chamber and a second leaching chamber, and... | 07/15/2003 |
