Inventor · disambiguated record
Goang-Cheng Chang
Also filed as: CHANG GOANG-CHENG
4 granted patents·1 pending application·8 citations·filing 2002–2018
66Inventor score
Top patents by PatentIndex Score
5 records- 0180US10351427B2System for manufacturing high purity sulfuric acidASIA UNION ELECTRONIC CHEMICAL CORP·Filed 2018·Granted Jul 16, 2019·3 cites·9 claims
- 0258US8088266B2Electrodialysis method for purifying of silicate-containing potassium hydroxide etching solutionDOVE CURTIS DOUGLAS·Filed 2009·Granted Jan 3, 2012·3 cites·15 claims
- 0352US9926198B2Method for manufacturing high purity sulfuric acidASIA UNION ELECTRONIC CHEMICAL CORP·Filed 2014·Granted Mar 27, 2018·0 cites·6 claims
- 0446US6734686B2Method for detecting quantity variation of high purity liquid chemicals and devices to carry out the methodNANMAT TECHNOLOGY CO LTD·Filed 2002·Granted May 11, 2004·2 cites·10 claims
- 0526US2004168712A1Method for cleaning semiconductor manufacturing systemNANMAT TECHNOLOGY CO LTD·Filed 2004·Application pending·0 cites
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Identity basis: PatentsView inventor disambiguation (2025Q4-odp release). How scoring works →