Patents by Inventor Puspa Ratu

Puspa Ratu 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).

  • Catalyst composition for the isomerization of n-paraffin and a process for isomerizing n-paraffin
    Patent number: 7119042
    Abstract: Provided is a catalyst composition for the isomerization of n-paraffin which comprises a ?-zeolite having been synthesized according to a dry gel process and contains cerium, the ?-zeolite being characterized in that it has an average particle diameter of 0.01˜0.1 ?m and the proportion of the cerium in the ?-zeolite is within the range of 0.001˜0.2 in terms of the atomic ratio of the silicon atom in the ?-zeolite to the cerium atom, i.e. [Ce]/[Si] as well as a process for isomerizing n-paraffin which comprises bringing n-paraffin into contact with the catalyst composition as set forth above.
    Type: Grant
    Filed: March 10, 2004
    Date of Patent: October 10, 2006
    Assignee: Gifu University
    Inventors: Yoshihiro Sugi, Yoshihiro Kubota, Yoichi Nishimura, Puspa Ratu