Patents by Inventor Cynthis T. Chu

Cynthis T. Chu 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).

  • Activation of zeolites
    Patent number: 5271920
    Abstract: The invention includes a ZSM-5 composition and the preparation thereof which comprises treating ZSM-5 with solutions of salts of weak acids. The resulting ultrasmall crystal size ZSM-5 component has a sorption capacity for 2,2-dimethylbutane of at least 10 mg/g zeolite and a sorption time for 30% capacity zeolitic sorption at 60.degree. C. and P(2,2-dimethylbutane) of 60 torr, of less than about 4 minutes.
    Type: Grant
    Filed: January 7, 1992
    Date of Patent: December 21, 1993
    Assignee: Mobil Oil Corporation
    Inventors: Clarence D. Chang, Nai Y. Chen, Cynthis T. Chu, Bruce P. Pelrine