Patents Represented by Attorney Jack F. Sieberth

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  • Graft copolymers of olefinic nitriles and olefinic esters on diene rubbers
    Patent number: 4038344
    Abstract: Impact resistant polymers having low permeability to gases and vapors are prepared by polymerizing an olefinic nitrile such as acrylonitrile with an olefinic ester such as methyl acrylate in an aqueous medium in the presence of a diene rubber.
    Type: Grant
    Filed: August 31, 1971
    Date of Patent: July 26, 1977
    Assignee: Ethyl Corporation
    Inventors: Allan A. Eisenbraun, Edwin D. Hornbaker