Patents by Inventor Rudolf A. Kerner

Rudolf A. Kerner 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).

  • Processing method for the manufacturing of electronic components using a soft soldering flux based on carboxylic acid
    Patent number: 5116432
    Abstract: A soft soldering flux based on organic carboxylic acids is particularly suitable for the production of electronic and electrical components. Its reduced solids content (e.g. 6%) makes it specially suited to SMT manufacturing and in-circuit tests. To this end, alkylfluorinated alcohols of formula Rf--CH.sub.2 --CH.sub.2 --OH, alicyclic and aromatic mono-, di-, or polycarboxylic acids with at least one carbon ring or their derivatives are introduced, using aliphatic mono-, di, poly-, keto- or hydroxy carboxylic acids and quaternary ammonium salts.
    Type: Grant
    Filed: June 14, 1990
    Date of Patent: May 26, 1992
    Inventor: Rudolf A. Kerner