Patents by Inventor William W. Levis, Jr.

William W. Levis, Jr. 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 preparing an oxyalkylated product and reaction product thereof
    Patent number: 3957922
    Abstract: An oxyalkylated product useful for making polyurethane foams is prepared by reacting an alkylene oxide with a heated mixture of a phenol and a non-phenolic active hydrogen compound, at least one of which can be halogenated, in the presence of a catalyst complex of a phenol and an iron or aluminum substance. The mixture can also include a neutral phosphorus compound and/or acid anhydrides to enhance flame retardant properties. Optionally, also, the oxyalkylation reaction can be terminated by adding a tri (lower alkyl) amine and alkylene oxide to react with residual phenolic hydrogen in the mixture.
    Type: Grant
    Filed: December 17, 1973
    Date of Patent: May 18, 1976
    Assignee: BASF Wyandotte Corporation
    Inventors: Arthur L. Austin, William W. Levis, Jr., Louis C. Pizzini, Robert J. Hartman
  • Highly-stable graft copolymer dispersions in polyols containing unsaturation and polyurethanes prepared therefrom
    Patent number: RE29014
    Abstract: Highly-stable graft copolymer dispersions are prepared by the in situ polymerization in the presence of a free radical catalyst of a vinyl monomer in a polyol containing an essential amount of unsaturation. The dispersions are low-viscous liquids which may be advantageously employed in the preparation of flexible urethane foams having enhanced load-bearing properties.
    Type: Grant
    Filed: August 25, 1975
    Date of Patent: October 26, 1976
    Assignee: BASF Wyandotte Corporation
    Inventors: Louis C. Pizzini, Gerhard G. Ramlow, John T. Patton, Jr., William W. Levis, Jr.