Patents by Inventor Kenneth E. Johnsen

Kenneth E. Johnsen 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: 5500469
    Abstract: An artificial latex comprising a stable aqueous colloidal dispersion of a preformed multiblock copolymer prepared using a sulfate of an ethoxylated phenol as a dispersing and stabilizing agent is described. This composition is particularly suitable for preparing articles such as gloves or condoms that are free of vulcanizing agents and proteins.
    Type: Grant
    Filed: September 22, 1994
    Date of Patent: March 19, 1996
    Assignee: The Dow Chemical Company
    Inventors: Kenneth E. Johnsen, Ronald R. Pelletier
  • 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
  • Patent number: 4015317
    Abstract: Textile fibers exhibiting improved characteristics for weaving on water jet looms are prepared by sizing such fibers with copolymers of an aliphatic .alpha.-olefin such as ethylene and an ammoniated .alpha.,.beta.-ethylenically unsaturated carboxylic acid such as ammonium acrylate.
    Type: Grant
    Filed: February 18, 1976
    Date of Patent: April 5, 1977
    Assignee: The Dow Chemical Company
    Inventor: Kenneth E. Johnsen