Patents by Inventor Paul E. Strege

Paul E. Strege 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 making alkylene carbonates
    Patent number: 4353831
    Abstract: Hexachloroacetone and a vicinal alkylene diol react when heated together in the presence of a weak base to produce chloroform and the cyclic alkylene carbonate. The chloroform distills from the reaction mixture substantially as it is formed and the alkylene carbonate is readily separable from the residual mixture.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: October 12, 1982
    Assignee: The Dow Chemical Company
    Inventors: Paul E. Strege, James M. Renga
  • Process for making alkylene carbonates
    Patent number: 4344881
    Abstract: A lower alkyl trichloroacetate and a vicinal alkylene diol react when heated together in the presence of a weak base to produce chloroform, a lower alkanol, and the cyclic alkylene carbonate. The chloroform and lower alkanol distill from the reaction mixture substantially as formed and the alkylene carbonate is readily separable from the residual mixture.
    Type: Grant
    Filed: February 2, 1981
    Date of Patent: August 17, 1982
    Assignee: The Dow Chemical Company
    Inventors: Paul E. Strege, James M. Renga
  • Inorganic halide salt catalysts for hydroxyalkylation of phenols or thiophenols
    Patent number: 4341905
    Abstract: Hydroxyalkylphenyl ether or thioether compounds are prepared by reaction of cyclic organic carbonate compounds with phenols or thiophenols in the presence of an alkali metal halide catalyst.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: July 27, 1982
    Assignee: The Dow Chemical Company
    Inventor: Paul E. Strege
  • Phosphonium catalysts for hydroxyalkylation of phenols or thiophenols
    Patent number: 4310708
    Abstract: Hydroxyalkylphenyl ether or thioether compounds are prepared by reaction of cyclic organic carbonate compounds with phenols or thiophenols in the presence of phosphonium catalysts.
    Type: Grant
    Filed: August 28, 1980
    Date of Patent: January 12, 1982
    Assignee: The Dow Chemical Company
    Inventors: Paul E. Strege, George A. Doorakian
  • Sodium stannate catalyst for hydroxyalkylation of phenols or thiophenols
    Patent number: 4310707
    Abstract: Hydroxyalkylphenyl ether or thioether compounds are prepared by reaction of cyclic organic carbonate compounds with phenols or thiophenols in the presence of Na.sub.2 SnO.sub.3 catalyst.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: January 12, 1982
    Assignee: The Dow Chemical Company
    Inventor: Paul E. Strege
  • Imidazole catalysts for hydroxyalkylation of phenols or thiophenols
    Patent number: 4310706
    Abstract: Hydroxyalkylphenyl ether or thioether compounds are prepared by reaction of cyclic organic carbonate compounds with phenols or thiophenols in the presence of an imidazole catalyst.
    Type: Grant
    Filed: August 18, 1980
    Date of Patent: January 12, 1982
    Assignee: The Dow Chemical Company
    Inventor: Paul E. Strege