Patents by Inventor Daniel A. Dimmig

Daniel A. Dimmig 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).

  • Concentrated aqueous latex of ethylene/C.sub.2 -C.sub.3 -perfluorocarbon copolymer or terpolymer
    Patent number: 4225482
    Abstract: A process for preparing an aqueous concentrated latex of a copolymer or terpolymer of ethylene and a C.sub.2 -C.sub.3 -perfluorocarbon by creaming a latex of 25-30% copolymer solids and recovering a concentrated latex having 1.5-2.5 times the concentration of the starting latex. The concentrated latex can be used to prepare crack-free or void-free coatings on substrates.
    Type: Grant
    Filed: December 12, 1978
    Date of Patent: September 30, 1980
    Assignee: Pennwalt Corporation
    Inventors: Richard A. Ferren, Daniel A. Dimmig, John C. Grigger
  • Process for preparing mercaptans
    Patent number: 4140604
    Abstract: An improvement in the process for preparing mercaptans wherein an ethylenically unsaturated organic compound is reacted with hydrogen sulfide that is present in molar excess, catalyzed by UV light, with recovery of the desired mercaptan from the reaction mixture. The improvement being the carrying out of the reaction in the presence of an effective amount of selected class of acetophenone reaction promoters. The improved process results in much faster reaction rates.
    Type: Grant
    Filed: July 3, 1978
    Date of Patent: February 20, 1979
    Assignee: Pennwalt Corporation
    Inventor: Daniel A. Dimmig