Patent №
US 5,972,080
Granted
1999-10-26
Filed 1997
Owner
DAINIPPON INK AND CHEMICALS, INC.
Lab
—
AI components
1
evo
Assignment
Recorded
Dataset
AIPD
2023_r1 edition
Application
08900705
Separation membranes excellent in strength, durability, heat resistance and solvent resistance as well as in balance between substance separation properties and substance permeability are disclosed, which are formed from polyhydrazidoimide resins, and preferably comprises a non-porous dense layer formed from a polyhydrazidoimide resin obtained from the reaction of an aromatic tetracarboxylic dianhydride such as 4,4'-(hexafluoroisopropylidene)diphthalic anhydride and an aromatic dihydrazide such as isophthalic dihydrazide as essential components.
AI classification
Ownership
DAINIPPON INK AND CHEMICALS, INC.
assignment · 86610598
Assignors
NAGATA, YOSHITOMO
On an employer assignment, the assignors are typically the inventors.