P

Inventor

TAKEMURA KOUHEI

JP26 patents
⚠️ This page may combine multiple inventors who share the name “TAKEMURA KOUHEI”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

MITSUBISHI GAS CHEMICAL CO

13 patents
US11945791B2Apr 2, 2024

Allyl compound and composition for optical material

MITSUBISHI GAS CHEMICAL CO0 citations62
US11919877B2Mar 5, 2024

Production method for 1,2,3,5,6-pentathiepane

MITSUBISHI GAS CHEMICAL CO0 citations60
US11858920B2Jan 2, 2024

Episulfide compound and composition for optical material

MITSUBISHI GAS CHEMICAL CO0 citations60
US11186673B2Nov 30, 2021

Composition for use as optical material

MITSUBISHI GAS CHEMICAL CO0 citations60
US11078363B2Aug 3, 2021

Optical material composition

MITSUBISHI GAS CHEMICAL CO0 citations58
US10982094B2Apr 20, 2021

Optical material composition

MITSUBISHI GAS CHEMICAL CO0 citations58
US12552902B2Feb 17, 2026

Composition for optical material

MITSUBISHI GAS CHEMICAL CO0 citations57
US12486352B2Dec 2, 2025

Composition, and optical material and lens using same

MITSUBISHI GAS CHEMICAL CO0 citations56
US10047043B2Aug 14, 2018

Thiol compound composition for optical material

MITSUBISHI GAS CHEMICAL CO0 citations52
US9914799B2Mar 13, 2018

Composition for optical material and method for producing same, and optical material produced from composition for optical material

MITSUBISHI GAS CHEMICAL CO0 citations52
US9663618B2May 30, 2017

Optical material composition, and application for same

MITSUBISHI GAS CHEMICAL CO0 citations52
US9260566B2Feb 16, 2016

Composition for optical materials, process for production thereof, and optical materials made from the composition

MITSUBISHI GAS CHEMICAL CO0 citations52
US9322957B2Apr 26, 2016

Method for producing optical material

MITSUBISHI GAS CHEMICAL CO0 citations42

SUMITOMO RUBBER IND

6 patents

DAIKIN IND LTD

3 patents

OGISHI HIDETAKA

3 patents

TAKEMURA KOUHEI

1 patent