Patents by Inventor Tatsuo Kuratomi

Tatsuo Kuratomi 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).

  • Method for preparation of an improved K-A type zeolite and for separation by adsorption polar and non-polar molecules
    Patent number: 3982912
    Abstract: A novel type of zeolite is obtained by replacing ion-exchangeable active cations in A-type zeolite with potassium ions and divalent cations at 33.3 to 83.3% and 16.7 to 66.7%, respectively to combine into the total of 100%. This zeolite is effective for separation of a mixture consisting of non-polar molecules and polar molecules having the adsorption effective cross-section less than 5 A. For instance, monosilane and phosphine, both of which are adsorbed by the conventional Ca--A type zeolite, can be separated by the novel K--A type zeolite which adsorbs phosphine.
    Type: Grant
    Filed: May 6, 1974
    Date of Patent: September 28, 1976
    Inventors: Yoshifumi Yatsurugi, Tatsuo Kuratomi, Tetsuo Takaishi