Patents by Inventor Joseph W. Nemec

Joseph W. Nemec 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).

  • Preparation of methacrolein and methacrylonitrile from tert-butyl alkanoates
    Patent number: 4443383
    Abstract: The present invention relates to a process of the conversion of tert-butyl alkanoates to methacrolein or methacrylonitrile, and more particularly to a process for the conversion of tert-butyl acetate to methacrolein or methacrylonitrile.
    Type: Grant
    Filed: July 21, 1982
    Date of Patent: April 17, 1984
    Assignee: Rohm and Haas Company
    Inventors: Joseph W. Nemec, Michael S. Cholod
  • Preparation of methacrolein and methacrylonitrile from tert-butyl alkanoates
    Patent number: 4358622
    Abstract: The present invention relates to a process of the conversion of tert-butyl alkanoates to methacrolein or methacrylonitrile, and more particularly to a process for the conversion of tert-butyl acetate to methacrolein or methacrylonitrile.
    Type: Grant
    Filed: March 19, 1981
    Date of Patent: November 9, 1982
    Assignee: Rohm and Haas Company
    Inventors: Joseph W. Nemec, Michael S. Cholod
  • Esters of 4-substituted 2-methyleneglutaric acids and method for preparing same
    Patent number: 4145559
    Abstract: Esters of 4-substituted 2-methyleneglutaric acids are prepared by reacting an ester of acrylic acid with an ester of an .alpha.-substituted acrylic acid, such as an ester of methacrylic acid, in the presence of a tertiary organic phosphine, an organic phosphorus triamide, an organic phosphonous diamide, or an organic phosphinous amide.
    Type: Grant
    Filed: November 6, 1974
    Date of Patent: March 20, 1979
    Assignee: Rohm and Haas Company
    Inventors: Joseph W. Nemec, Richard B. Wuchter
  • Divinylacetylenes as polymerization inhibitors for acrylic and methacrylic acid
    Patent number: 4010082
    Abstract: A method is disclosed for inhibiting the polymerization of acrylic and methacrylic acids at ambient or above ambient temperature, such as during preparation, purification or storage of the acids under substantially anaerobic conditions, by adding thereto a polymerization inhibiting amount of a compound having the formula: ##STR1## where R, R', R", R"' are hydrogen, alkyl or aryl.
    Type: Grant
    Filed: August 21, 1975
    Date of Patent: March 1, 1977
    Assignee: Rohm and Haas Company
    Inventors: Joseph W. Nemec, Thomas Stewart