Patents by Inventor Tetsuzo Hayashi

Tetsuzo Hayashi 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).

  • Crosslinked composite semipermeable membrane
    Patent number: 4337154
    Abstract: A composite semipermeable membrane comprising a porous support and a crosslinked thin film formed on said porous support, said crosslinked thin film being formed by reacting compound (A) which is at least one compound selected from the group consisting of polyalkylenimines and polyalkylenimine derivatives, compound (B) which is at least one compound selected from a group of compounds typified by piperazine, 2,5-dimethylpiperazine, 4-aminomethylpiperidine and 1,4,8,11-tetraazacyclotetradecane, and compound (C) as a crosslinking agent which is a compound having in one molecule two or more functional groups capable of reacting with amino groups; and a process for preparing said composite semipermeable membrane.
    Type: Grant
    Filed: April 1, 1980
    Date of Patent: June 29, 1982
    Assignee: Nippon Shokubai Kagaku Kogyo Co., Ltd.
    Inventors: Shuzo Fukuchi, Tetsuzo Hayashi, Hiroya Kobayashi, Ryoichi Oshiumi