Patents Represented by Attorney, Agent or Law Firm Robert M. O'Keefe
  • Catalytic formation of diarylcarbonates
    Patent number: 5239105
    Abstract: Diphenylcarbonate is produced by contacting phenol with phosgene or phenylchloroformate or mixture thereof in the presence of one or more heterogeneous catalysts. The catalysts include Group VB metal oxides: silicates of Groups IIA, IIIB, IVB, VB, and the lanthanide and actinide metals: tungsten oxides: and clays. The more preferred catalysts are silicates of yttrium, titanium, or zirconium.
    Type: Grant
    Filed: January 30, 1992
    Date of Patent: August 24, 1993
    Assignee: The Dow Chemical Company
    Inventors: R. Garth Pews, Robert G. Bowman
  • Magnetic recording media a comprising magnetic particles binder and (fluorinated phenoxy)(3-perfluoroalkylphenoxy)-cyclic phosphazene lubricant
    Patent number: 5230964
    Abstract: A magnetic recording media containing a lubricant which is a cyclic phosphazene completely substituted with fluorinated phenoxy substituents and m-perfluoroalkylphenoxy substituents, in ratios ranging from 1:1 to 1:5 is disclosed. The recording media and lubricant are particularly useful for advanced, high density magnetic recording media.
    Type: Grant
    Filed: December 20, 1990
    Date of Patent: July 27, 1993
    Assignee: The Dow Chemical Company
    Inventors: Kishore K. Kar, Chester E. Pawloski, Ted A. Morgan
  • Decolorization of polyalkylene polyamines
    Patent number: 5227528
    Abstract: A process for decolorizing polyalkylene polyamines, which comprises contacting one or more polyalkylene polyamines having an average molecular weight of greater than about 200 and less than about 1000 with carbon at a temperature greater than or equal to about 100.degree. C. and less than or equal to about 300.degree. C. under conditions effective to reduce the color rating of the one or more polyalkylene polyamines.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: July 13, 1993
    Assignee: The Dow Chemical Company
    Inventors: Stephen J. Webster, John H. Mitchell
  • Method of radially flaring a resilient pipe liner
    Patent number: 5056210
    Abstract: A method of securing a loose polymeric resilient liner to a rigid pipe to permit flaring of the polymeric liner to form a flange joint interface. Apparatus to secure the resilient liner while the polymer liner is flared is also disclosed.
    Type: Grant
    Filed: February 8, 1990
    Date of Patent: October 15, 1991
    Assignee: The Dow Chemical Company
    Inventor: Howard W. King, Jr.