Hang Duk Roh

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Suwon-si, KR

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Patents Grantslast 30 patents

Information Patent Grant
Process for manufacturing terephthalic acid
- Patent number 6,310,239
- Issue date Oct 30, 2001
- Sunkyong Industries Co., Ltd.
- Hang-Duk Roh
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for manufacturing terephthalic acid
- Patent number 6,075,163
- Issue date Jun 13, 2000
- Sunkyong Industries Co., Ltd.
- Hang-Duk Roh
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Process for manufacturing terephthalic acid
- Patent number 6,031,128
- Issue date Feb 29, 2000
- Sunkyong Industries Co., Ltd.
- Hang-Duk Roh
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Reactive distillation process and equipment for the production of a...
- Patent number 5,770,770
- Issue date Jun 23, 1998
- Sunkyong Industries
- Ki-Joo Kim
- C07 - ORGANIC CHEMISTRY