Patents Represented by Attorney Michael Keehan

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  • Propellants having improved resistance to oxidative hardening
    Patent number: 3982975
    Abstract: The invention provides epoxy cured rubber based propellants containing one or more N,N'-dialkyl- and/or diarylphenylenediamines chemically locked in the polymeric network to impart improved resistance to oxidative hardening of the propellant surface and inner structure.
    Type: Grant
    Filed: June 4, 1968
    Date of Patent: September 28, 1976
    Assignee: Hercules Incorporated
    Inventors: Donald E. Elrick, Harry Gilbert