Patents by Inventor Ralph R. Nielsen

Ralph R. Nielsen 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).

  • Soil anti-crustant
    Patent number: 4208973
    Abstract: Reduction of encrustation of a soil where tender crops are germinated by treating the seed bed with an effective amount of a quaternary ammonium cationic polymer, either polydiallyl dimethyl ammonium chloride or a polymer of dimethylamine/epichlorohydrin dissolved in water.
    Type: Grant
    Filed: January 12, 1979
    Date of Patent: June 24, 1980
    Assignee: Nalco Chemical Company
    Inventors: William K. Baer, Ralph R. Nielsen, Joseph F. Vartiak
  • Continuous process for the preparation of a cationically modified acrylamide polymer
    Patent number: 4022741
    Abstract: A process for preparing a dilute aqueous solution of a cationically modified polyacrylamide from a water-in-oil emulsion of a finely divided water soluble acrylamide polymer, a secondary amine containing 2 - 4 carbon atoms and formaldehyde is disclosed.
    Type: Grant
    Filed: March 15, 1976
    Date of Patent: May 10, 1977
    Assignee: Nalco Chemical Company
    Inventors: Richard F. Tuka, Peter H. Vossos, Ralph R. Nielsen, Carl J. Guardia
  • Continuous process for the preparation of a cationically modified acrylamide polymer
    Patent number: 4021394
    Abstract: A process for preparing a dilute aqueous solution of a cationically modified polyacrylamide from a water-in-oil emulsion of a finely divided water soluble acrylamide polymer, a secondary amine containing 2-4 carbon atoms and formaldehyde is disclosed.
    Type: Grant
    Filed: November 12, 1975
    Date of Patent: May 3, 1977
    Assignee: Nalco Chemical Company
    Inventors: Richard F. Tuka, Peter H. Vossos, Ralph R. Nielsen, Carl J. Guardia