Patents by Inventor Paul G. Gassman

Paul G. Gassman 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 azasulfonium halide salts
    Patent number: 3954797
    Abstract: Preparing azasulfonium halide salt derivatives of an aniline by reacting a halogen with a non-carbonylic dihydrocarbon sulfide, a beta-carbonylic hydrocarbon sulfide, or a .beta.-thio ester or amide to form a halogen: sulfur compound complex and then reacting the complex with an aniline to form the azasulfonium halide salts. The azasulfonium halide salts are useful as intermediates in processes for making ortho-alkylated anilines, indoles, and 2-oxindoles which have a variety of known uses.
    Type: Grant
    Filed: December 28, 1973
    Date of Patent: May 4, 1976
    Assignee: Chromalloy American Corporation
    Inventors: Paul G. Gassman, Gordon D. Gruetzmacher