Hiroshi Ookuma

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Tokyo, JP

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Patents Grantslast 30 patents

Information Patent Grant
Spiro compound having azafluorene ring structure, light-emitting ma...
- Patent number 10,916,711
- Issue date Feb 9, 2021
- Hodogaya Chemical Co., Ltd.
- Chihaya Adachi
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Grant
Compound having an indolocarbazole ring structure and organic elect...
- Patent number 9,564,600
- Issue date Feb 7, 2017
- Hodogaya Chemical Co., Ltd.
- Norimasa Yokoyama
- C07 - ORGANIC CHEMISTRY
Information Patent Grant
Organic electroluminescent device
- Patent number 9,553,272
- Issue date Jan 24, 2017
- Hodogaya Chemical Co., Ltd.
- Norimasa Yokoyama
- C07 - ORGANIC CHEMISTRY

Patents Applicationslast 30 patents

Information Patent Application
ARYLAMINE COMPOUND AND ORGANIC ELECTROLUMINESCENT DEVICE
- Publication number 20180175301
- Publication date Jun 21, 2018
- Hodogaya Chemical Co., Ltd.
- Hiroshi OOKUMA
- C07 - ORGANIC CHEMISTRY
Information Patent Application
SPIRO COMPOUND HAVING AZAFLUORENE RING STRUCTURE, LIGHT-EMITTING MA...
- Publication number 20170018720
- Publication date Jan 19, 2017
- Hodogaya Chemical Co., Ltd.
- Chihaya Adachi
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
NOVEL TRIPHENYLENE DERIVATIVES AND ORGANIC ELECTROLUMINESCENT DEVIC...
- Publication number 20150034924
- Publication date Feb 5, 2015
- Hodogaya Chemical Co., Ltd.
- Norimasa Yokoyama
- H01 - BASIC ELECTRIC ELEMENTS
Information Patent Application
COMPOUND HAVING AN INDOLOCARBAZOLE RING STRUCTURE AND ORGANIC ELECT...
- Publication number 20140124756
- Publication date May 8, 2014
- Hodogaya Chemical Co., Ltd.
- Norimasa Yokoyama
- C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
Information Patent Application
ORGANIC ELECTROLUMINESCENT DEVICE
- Publication number 20140021451
- Publication date Jan 23, 2014
- Hodogaya Chemical Co., Ltd.
- Norimasa Yokoyama
- C07 - ORGANIC CHEMISTRY