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Inventor

VOLLSTEDT THOMAS J

US7 patents
⚠️ This page may combine multiple inventors who share the name “VOLLSTEDT THOMAS J”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

ZIMPRO PASSAVANT INC

3 patents
US4919815AApr 24, 1990

Two-stage anaerobic/aerobic treatment process

ZIMPRO PASSAVANT INC143 citations96
US4810386AMar 7, 1989

Two-stage wastewater treatment

ZIMPRO PASSAVANT INC58 citations95
US4897196AJan 30, 1990

Two-stage batch wastewater treatment

ZIMPRO PASSAVANT INC43 citations91

ZIMPRO ENVIRONMENTAL INC

1 patent
US5302288AApr 12, 1994

Treatment of highly colored wastewaters

ZIMPRO ENVIRONMENTAL INC183 citations97

STERLING DRUG INC

1 patent
US3932278AJan 13, 1976

Filter cleaning method

STERLING DRUG INC43 citations91

SIEMENS WATER TECH CORP

1 patent
US7678268B2Mar 16, 2010

Wastewater treatment system

SIEMENS WATER TECH CORP19 citations88

ZIMPRO INC

1 patent
US4620563ANov 4, 1986

Blowdown pot for a reactor

ZIMPRO INC7 citations72