P

Inventor

SUGAWARA TSUKASA

JP17 patents
⚠️ This page may combine multiple inventors who share the name “SUGAWARA TSUKASA”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.

TOKYO OHKA KOGYO CO LTD

13 patents
US9911955B2Mar 6, 2018

Method for producing porous polyimide film, porous polyimide film and separator using same

TOKYO OHKA KOGYO CO LTD3 citations72
US9601739B2Mar 21, 2017

Method for producing porous polyimide film, porous polyimide film and separator using same

TOKYO OHKA KOGYO CO LTD3 citations72
US10429738B2Oct 1, 2019

Filtration filter, filtration method, production method of purified liquid chemical product for lithography, and method of forming resist pattern

TOKYO OHKA KOGYO CO LTD2 citations65
US10189968B2Jan 29, 2019

Varnish for porous polyimide film production and method for producing porous polyimide film using same

TOKYO OHKA KOGYO CO LTD1 citations59
US10525418B2Jan 7, 2020

Purification method for purifying liquid, purification method for purifying silicon compound-containing liquid, method for producing silylating agent liquid, film forming material or diffusing agent composition, filter medium and filter device

TOKYO OHKA KOGYO CO LTD0 citations51
US11713383B2Aug 1, 2023

Method for producing porous film, method for producing composition for producing porous film, and porous film

TOKYO OHKA KOGYO CO LTD0 citations50
US11344848B2May 31, 2022

Porous film and method for producing same

TOKYO OHKA KOGYO CO LTD0 citations50
US10865286B2Dec 15, 2020

Method for manufacturing porous membrane

TOKYO OHKA KOGYO CO LTD0 citations50
US10763480B2Sep 1, 2020

Porous separator for secondary batteries and secondary battery using same

TOKYO OHKA KOGYO CO LTD0 citations50
US9683087B2Jun 20, 2017

Production method for porous polyimide resin film, porous polyimide resin film, and separator employing same

TOKYO OHKA KOGYO CO LTD0 citations50
US10177357B2Jan 8, 2019

Method for producing porous polyimide film

TOKYO OHKA KOGYO CO LTD0 citations47
US10576433B2Mar 3, 2020

Method for purifying liquid, method for producing chemical solution or cleaning solution, filter medium, and filter device

TOKYO OHKA KOGYO CO LTD0 citations46
US10576432B2Mar 3, 2020

Polyimide and/or polyamideimide porous body and method for manufacturing same, method for separation and/or adsorption, separation material, adsorption material, filter media, laminate, and filter device

TOKYO OHKA KOGYO CO LTD0 citations38

HITACHI HIGH TECH CORP

4 patents