Patents by Inventor David L. Cresswell

David L. Cresswell 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).

  • Reactors for effecting chemical processes
    Patent number: 5324904
    Abstract: An inductively heatable reactor for effecting fluid phase chemical processes. The reactor comprises an inductively heatable, fluid permeable reactor element having at least one solid block in which is provided a plurality of fluid conveying ducts which extend through the reactor element in a substantially parallel arrangement from one end face thereof to the other.
    Type: Grant
    Filed: June 9, 1992
    Date of Patent: June 28, 1994
    Assignee: Imperial Chemical Industries PLC
    Inventors: David L. Cresswell, Eric W. Sims, Ralph J. Doy
  • Production of tetrafluoroethylene and hexafluoropropylene
    Patent number: 4849554
    Abstract: Production of tetrafluoroethylene and hexafluoropropylene in very high combined selectivity by pyrolysis of chlorodifluoromethane, optionally using gaseous diluent wherein the pyrolysis is effected under substantially isothermal and uniform conditions, the reaction temperature is within the range 750.degree.-980.degree. C. (preferably 800.degree.-980.degree. C.), and the gaseous residence time is within the range 1 to 50 milliseconds. A fluidphase electromagnetic induction reactor suitable for effecting the process is described.
    Type: Grant
    Filed: March 22, 1988
    Date of Patent: July 18, 1989
    Assignee: Imperial Chemical Industries plc
    Inventors: David L. Cresswell, Eric W. Sims