Patents by Inventor Barry W. Farrant

Barry W. Farrant 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 separation of halogenated hydrocarbons by extractive distillation
    Patent number: 5200431
    Abstract: Method for separating 1,1,1,2-tetrafluoroethane from a mixture thereof with chlorine-containing halogenated hydrocarbons such as HCFC's 1122, 124, 114, 114a and 133a which comprises adding an extraction agent to the mixture and extractively distilling the mixture in an extractive distillation zone from which HFA 134a containing less than 10 ppm of chlorinated contaminants is recovered. Suitable extraction agents include trichloroethylene, perchloroethylene, alpha-pinene and cyclohexane.
    Type: Grant
    Filed: August 21, 1991
    Date of Patent: April 6, 1993
    Assignee: Imperial Chemical Industries PLC
    Inventors: Pravin K. Dattani, John D. Scott, Barry W. Farrant, Charles J. Shields
  • Coating compositions comprising a polysulfone and fluorocarbon polymer
    Patent number: RE31448
    Abstract: A coating composition is provided which comprises (a) 10% to 90% by weight of at least one thermoplastic aromatic .[.polysulphones.]. .Iadd.polysulphone .Iaddend.preferably having a reduced viscosity of at least 0.3 (measured at 25.degree. C. on a solution in dimethyl formamide containing 1 g of polymer in 100 cm.sup.3 of solution) and (b) 90% to 10% by weight of at least one fluorocarbon polymer.
    Type: Grant
    Filed: January 29, 1982
    Date of Patent: November 22, 1983
    Assignee: Imperial Chemical Industries, Ltd.
    Inventors: Terence E. Attwood, Barry W. Farrant