Patents by Inventor Midori Seki

Midori Seki 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).

  • Permselective composite membrane having improved gas permeability and selectivity
    Patent number: 5176724
    Abstract: A permselective composite membrane comprising a porous support of a polysulfone or a polyether sulfone in combination with an ultrathin film of a defined polyacetylene whereby an interfacial layer is formed between the support and ultrathin film by the combination of the polysulfone or polyether sulfone and the polyacetylene and facilitates a gas permeability and a separation ratio of an intended gas and a useless gas. The ultrathin film may be covered with another ultrathin film of a different polymer. The interfacial layer made of phthalocyanine or its coordination compound may be provided between the support and the first-mentioned ultrathin film. In this case, various materials for the support and the first-mentioned ultrathin film may be used.
    Type: Grant
    Filed: August 26, 1991
    Date of Patent: January 5, 1993
    Assignee: Matsushita Electric Industrial Co., Ltd.
    Inventors: Yukihiro Saito, Shiro Asakawa, Katsunori Waragai, Midori Seki