Patents by Inventor Etsuji Ishimaru

Etsuji Ishimaru has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Polyhydroxy polyether, process for its production, and its use
    Patent number: 4675373
    Abstract: A substantially linear polyhydroxy polyether, which (1) is composed substantially of aromatic units and aliphatic units, the proportion of the aromatic units being 50 to 98 mole % based on the total amount of the aromatic units and the aliphatic units, (2) has an intrinsic viscosity, measured at 25.degree. C. in o-chlorophenol, of from 0.3 to 2 dl/g, and (3) has a glass transition, temperature of from 30.degree. to 120.degree. C. Two processes for preparing the polyhydroxy polyether are proposed. The polyhydroxy polyether is useful in applications which require gas-barrier property.
    Type: Grant
    Filed: April 16, 1986
    Date of Patent: June 23, 1987
    Assignee: Mitsui Petrochemical Industries, Ltd.
    Inventors: Tadao Yatsu, Etsuji Ishimaru, Kimiyoshi Miura