Patents by Inventor Fumiko Kitada

Fumiko Kitada 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).

  • Process for selectively separating gaseous mixtures containing water vapor
    Patent number: 4875908
    Abstract: A process for selectively separating water vapor from a multiple component gaseous mixture is provided. The process comprises passing a multicomponent gaseous mixture including water vapor along and in contact with a membrane which is selectively permeable to water vapor and wherein the water vapor permeation rate Q.sub.H.sbsb.2.sub.O is greater than 30 Nm.sup.3 /m.sup.2 .multidot.hr.multidot.atm at 25.degree. C. and the ratio of Q.sub.H.sbsb.2.sub.O to the permeation rate Q.sub.G of the gas to be separated from the water vapor, i.e., Q.sub.H.sbsb.2.sub.O Q.sub.G, is greater than 10,000. The membrane preferably has a thickness of about 0.1 microns to about 50 microns.
    Type: Grant
    Filed: January 26, 1989
    Date of Patent: October 24, 1989
    Inventors: Hiroyasu Kikukawa, Eiji Shimoda, Mari Sakai, Fumiko Kitada