Patents by Inventor Nemesio Rogelio Viso

Nemesio Rogelio Viso 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 the manufacture of 1,1,1,2-tetrafluoroethane
    Patent number: 5654494
    Abstract: This invention relates to a process for producing 1,1,1,2-tetrafluoroethane (HFC-134a). The process reacts, 1,1,1-trifluoro-2-chloroethane (HCFC-133a) and hydrogen fluoride in a first reactor. The product resulting from the first reaction step is brought to a second reactor together with trichloroethylene and hydrogen fluoride. The second reaction is conducted at a higher temperature than the first reactor. Optionally, HCl is removed prior to removal of the crude HFC-134a product. Unreacted HCFC-133a, trichloroethylene and hydrogen fluoride may be recycled back to the first reactor.
    Type: Grant
    Filed: August 18, 1995
    Date of Patent: August 5, 1997
    Assignee: AlliedSignal Inc.
    Inventors: Hsueh Sung Tung, Paul Gene Clemmer, Gustavo Cerri, Yuon Chiu, Stanley Michael Jaskot, Nemesio Rogelio Viso, Addison Miles Smith, Jeffrey Warren McKown, Jay Philip Friedenson