Patents by Inventor Alfred R. Nelson

Alfred R. Nelson 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).

  • Patent number: 4296019
    Abstract: A solvent blend capable of dissolving at a temperature of at least 60.degree. C. copolymers of ethylene and ethylenically unsaturated carboxylic acid. The solvent blend comprises from about 5 to about 35 percent by weight of an acyclic alcohol having from 2 to 12 carbon atoms, based upon the total weight of said solvent blend, about 3 percent to about 90 percent by weight of a monocyclic aromatic hydrocarbon, based upon the total weight of said solvent blend, and from about 5 to about 92 percent by weight of a halogenated C.sub.2 hydrocarbon, based on the total weight of said solvent blend. An exemplary solvent blend contains about 10 percent by weight of isopropanol, about 80 percent by weight of perchloroethylene, and about 10 percent by weight of toluene, based on the total weight of the solvent blend.
    Type: Grant
    Filed: November 29, 1979
    Date of Patent: October 20, 1981
    Assignee: The Dow Chemical Co.
    Inventors: Alfred R. Nelson, Kenneth E. Johnsen
  • Patent number: 4279797
    Abstract: A solvent blend capable of dissolving at ambient temperatures copolymers of ethylene and ethylenically unsaturated carboxylic acid. The solvent blend comprises from about 5 to about 35 percent by weight of an acylic alcohol having from 2 to 12 carbon atoms, based upon the total weight of said solvent blend, about 3 percent to about 90 percent by weight of a monocyclic aromatic hydrocarbon, based upon the total weight of said solvent blend, and from about 5 to about 92 percent by weight of a halogenated C.sub.2 hydrocarbon, based on the total weight of said solvent blend. An exemplary solvent blend contains about 10 percent by weight of isopropanol, about 80 percent by weight of perchloroethylene, and about 10 percent by weight of toluene, based on the total weight of the solvent blend.
    Type: Grant
    Filed: November 29, 1979
    Date of Patent: July 21, 1981
    Assignee: The Dow Chemical Company
    Inventors: Alfred R. Nelson, Kenneth E. Johnsen