Sung Keum CHOI

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Pyrimidine derivative and organic electroluminescent devices
- Patent number 10,566,543
- Issue date Feb 18, 2020
- Hodogaya Chemical Co., Ltd.
- Norimasa Yokoyama
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
PYRIMIDINE DERIVATIVE AND AN ORGANIC ELECTROLUMINESCENT DEVICE
- Publication number 20200303658
- Publication date Sep 24, 2020
- Hodogaya Chemical Co., Ltd.
- Shuichi HAYASHI
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
PYRIMIDINE DERIVATIVE AND ORGANIC ELECTROLUMINESCENT DEVICES
- Publication number 20180006239
- Publication date Jan 4, 2018
- Hodogaya Chemical Co., Ltd.
- Norimasa YOKOYAMA
- C07 - ORGANIC CHEMISTRY
Information Patent Application
PYRIMIDINE DERIVATIVE AND AN ORGANIC ELECTROLUMINESCENT DEVICE
- Publication number 20170186967
- Publication date Jun 29, 2017
- Hodogaya Chemical Co., Ltd.
- Shuichi HAYASHI
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...