Patents by Inventor Allyn J. Ziegenhagen

Allyn J. Ziegenhagen 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).

  • Polyolefin films having improved barrier properties
    Patent number: 5155160
    Abstract: The barrier properties of crystalline polyolefin film can be improved substantially by incorporating a precise amount of a partially incompatible wax into the polyolefin. When the polyolefin is polypropylene or polybutylene, the wax is preferably a paraffin wax. The precise amount of wax, which produces optimum improvement in barrier properties, lies in the range of about 3 to 10 percent based on the weight of the polyolefin. The range in which excellent results are obtained can be broadened by contacting the film with a cooling medium immediately after it is extruded. The film may be annealed to further improve the barrier properties.
    Type: Grant
    Filed: July 10, 1990
    Date of Patent: October 13, 1992
    Assignee: James River II, Inc.
    Inventors: Gene H. Yeh, Attila Matray, Allyn J. Ziegenhagen
  • Ethylene/chlorine elimination process
    Patent number: 4029714
    Abstract: An improvement in a process for recovering residual amounts of ethylene in ethylene chlorination effluents is disclosed, whereby ureacted chlorine is virtually eliminated. Elimination of the chlorine is accomplished by reacting it with the clorinated hydrocarbons in the stream over a novel ferric chloride catalyst mixture.
    Type: Grant
    Filed: November 5, 1975
    Date of Patent: June 14, 1977
    Assignee: Stauffer Chemical Company
    Inventors: Allyn J. Ziegenhagen, Ramsey G. Campbell