Patents by Inventor John C. Wetzel

John C. Wetzel 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).

  • Zeolites as smoke suppressants for halogenated polymers
    Patent number: 4307010
    Abstract: Zeolites and metal-ion exchanged zeolite are used to impart smoke suppressant characteristics to halogenated polymers.
    Type: Grant
    Filed: January 17, 1980
    Date of Patent: December 22, 1981
    Assignee: Pennwalt Corporation
    Inventors: Stanley R. Sandler, John C. Wetzel