Patents by Inventor Shunji Kumazawa

Shunji Kumazawa 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).

  • Fluid separation apparatus
    Patent number: 4293418
    Abstract: A fluid separation apparatus comprising a bundle or bundles of a great number of permselective hollow fibers inserted into a casing and having both the ends fixed by tube sheets is disclosed. This bundle is composed of a great number of hollow fiber elements, each of which consists of one or two hollow fibers wound around by a spacer yarn composed of a textured yarn. This fluid separation apparatus is advantageously used as an artificial kidney.
    Type: Grant
    Filed: March 28, 1979
    Date of Patent: October 6, 1981
    Assignee: Toray Industries, Inc.
    Inventors: Yoshishige Fujii, Syozo Nagao, Shunji Kumazawa