Patents by Inventor Carl G. Krespan

Carl G. Krespan 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 the preparation of carbacyl halosulfates
    Patent number: 4001319
    Abstract: Compounds containing carboxylic acid fluoride or chloride groups react with sulfur trioxide at temperatures between -30.degree. to about 100.degree. C to give carbonyl fluoro- or chlorosulfates. Preferred reactants are polyfluoroalkyl or polyfluoroalkenyl carbacyl acid fluorides. The carbacyl halosulfates are useful as cationic polymerization catalysts and as chemical intermediates.FIELD OF THE INVENTIONThis invention relates to a method of making carbacyl halosulfates.THE PRIOR ARTCertain perhalocarbacyl fluorosulfates, ##EQU1## are known, as shown in the following tabulation.______________________________________ Reference R.sub.f ______________________________________ 1. Des Marteau and Cady, Inorg. Trifluoromethyl Chem. 5, 169 (1966); Chem. Chlorodifluoromethyl Abs. 64, 8020 (1966) Pentafluoroethyl Heptafluoropropyl 2-(Fluorosulfonyloxy)- tetrafluoroethyl 2. Delfino and Shreeve, Inorg. Trifluoromethyl Chem. 5, 308 (1966); Chem. Abs. 64, 12544 (1966) 3. Fox & Franz, Inorg. Chem. Fluoro 5, 946 (1966); Chem.
    Type: Grant
    Filed: May 7, 1973
    Date of Patent: January 4, 1977
    Assignee: E. I. Du Pont de Nemours and Company
    Inventors: David C. England, Carl G. Krespan