Inventor

CHANG GOANG-CHENG

TW4 patents

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

ASIA UNION ELECTRONIC CHEMICAL CORP

2 patents

US10351427B2Jul 16, 2019

System for manufacturing high purity sulfuric acid

ASIA UNION ELECTRONIC CHEMICAL CORP3 citations61

US9926198B2Mar 27, 2018

Method for manufacturing high purity sulfuric acid

ASIA UNION ELECTRONIC CHEMICAL CORP0 citations40

DOVE CURTIS DOUGLAS

1 patent

US8088266B2Jan 3, 2012

Electrodialysis method for purifying of silicate-containing potassium hydroxide etching solution

DOVE CURTIS DOUGLAS3 citations50

NANMAT TECHNOLOGY CO LTD

1 patent

US6734686B2May 11, 2004

Method for detecting quantity variation of high purity liquid chemicals and devices to carry out the method

NANMAT TECHNOLOGY CO LTD2 citations49