Inventor
HESS RONALD E
US9 patents
Patents
9 patentsUS5358357AOct 25, 1994
Process and apparatus for high vacuum groundwater extraction
XEROX CORP58 citations92
US5050676ASep 24, 1991
Process for two phase vacuum extraction of soil contaminants
XEROX CORP65 citations91
US5655852AAug 12, 1997
High vacuum extraction of soil contaminants along preferential flow paths
XEROX CORP23 citations89
US5441365AAug 15, 1995
Apparatus and process for treating contaminated soil gases and liquids
XEROX CORP56 citations89
US5709505AJan 20, 1998
Vertical isolation system for two-phase vacuum extraction of soil and groundwater contaminants
XEROX CORP54 citations88
US5197541AMar 30, 1993
Apparatus for two phase vacuum extraction of soil contaminants
XEROX CORP41 citations88
US6048134AApr 11, 2000
Automatic aspirator air control system
XEROX CORP8 citations72
US6024868AFeb 15, 2000
Air flow control circuit for sustaining vacuum conditions in a contaminant extraction well
XEROX CORP8 citations71
US5979554ANov 9, 1999
Vacuum application method and apparatus for removing liquid contaminants from groundwater
XEROX CORP4 citations61