Keiko Izumi

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Toyonaka-shi, JP

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Patents Grantslast 30 patents

Information Patent Grant
Viscosity index improver and lubricating oil composition
- Patent number 10,982,167
- Issue date Apr 20, 2021
- Nippon Shokubai Co., Ltd.
- Yohei Imaizumi
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Viscosity index improver, method for producing the same and lubrica...
- Patent number 10,443,013
- Issue date Oct 15, 2019
- Nippon Shokubai Co., Ltd.
- Tadayoshi Ugamura
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Grant
Vinylpyrrolidone-based copolymer and a method for production thereof
- Patent number 7,851,568
- Issue date Dec 14, 2010
- Nippon Shokubai Co., Ltd.
- Daisuke Imai
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...

Patents Applicationslast 30 patents

Information Patent Application
VISCOSITY INDEX IMPROVER AND LUBRICATING OIL COMPOSITION
- Publication number 20190211281
- Publication date Jul 11, 2019
- NIPPON SHOKUBAI CO., LTD
- Yohei IMAIZUMI
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
VISCOSITY INDEX IMPROVER, METHOD FOR PRODUCING THE SAME AND LUBRICA...
- Publication number 20170233675
- Publication date Aug 17, 2017
- NIPPON SHOKUBAI CO., LTD
- Tadayoshi UGAMURA
- C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
Information Patent Application
Vinylpyrrolidone/Vinyl Acetate Copolymer, Process for Producing the...
- Publication number 20080247981
- Publication date Oct 9, 2008
- NIPPON SHOKUBAI CO., LTD
- Daisuke Imai
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
Information Patent Application
Vinylpyrrolidone-based copolymer and a method for production thereof
- Publication number 20080154001
- Publication date Jun 26, 2008
- Daisuke Imai
- C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...