P

Inventor

FRIESE DAVID D

US6 patents
⚠️ This page may combine multiple inventors who share the name “FRIESE DAVID D”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

DOW CHEMICAL CO

3 patents
US4950464AAug 21, 1990

Purification of sulfuryl fluroide by selective adsorption

DOW CHEMICAL CO20 citations76
US4629610ADec 16, 1986

Hydrogen fluoride recovery process

DOW CHEMICAL CO11 citations67
US4649201AMar 10, 1987

Removal of ferric chloride from halopyridines

DOW CHEMICAL CO2 citations59

APTWATER INC

1 patent
US9902634B2Feb 27, 2018

Modules for use in and operation of a membrane biofilm reactor with reduced biofouling

APTWATER INC5 citations58

DOWELANCO

1 patent
US4999432AMar 12, 1991

Fluorination with hydrogen fluoride

DOWELANCO5 citations53

APTWATER LLC

1 patent
US10843950B2Nov 24, 2020

Piping manifold for pulsating flow

APTWATER LLC0 citations31