Inventor

OHSHIMA IWAO

27 patents

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

OHSHIMA IWAO

NITTO CHEMICAL INDUSTRY CO LTD

Process for producing unsintered cristobalite silica

Process for manufacturing high purity silica

Method for producing unsintered cristobalite particles

Method for reducing the adhesiveness of hydrogel-like polymer by adding polyethylene glycol

Apparatus for stirring hydrogel particles of water-soluble polymer

Method for cooling polymeric hydrogel blocks

Process for preparing silica having a low silanol content

Polymerization of acrylamide in the presence of water-soluble nitrogen compounds

Process for the preparation of unsaturated quaternary ammonium salts

Production of water-soluble polymers

Process for purifying acrylamides

Metal surfaces coated with aliphatic acids containing 12 carbon atoms or more to eliminate polymer build-up on reactor walls during the polymerization of water-soluble cationic polymers

Method for preventing adhesiveness of a hydrogel of a water-soluble acrylamide-type polymer

TOSHIBA KK

Contact material

Internal component of fusion reactor

Vacuum interrupter and vacuum switch thereof

Reactor circulating pump system

Electrode arrangement of vacuum circuit breaker with magnetic member for longitudinal magnetization

Boiling water reactor

Vacuum switch

TOKYO SHIBAURA ELECTRIC CO

Apparatus for detecting degradation of characteristics of arresters

Sealed DC power converting station

Protective gap devices for protecting circuit breakers

Method and device for detecting metal ions

Plugging device

Plugging indicator

TOKYO ELECTRIC POWER CO

Protection apparatus for a capacitor connected in series with an electric power circuit