Hybrid rocket propellants containing azo compounds
Patent 5811725 Issued on September 22, 1998. Estimated Expiration Date: 
November 18, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.
November 18, 2016. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesInventorAssigneeApplicationNo. 748738 filed on 11/18/1996US Classes:149/19.4, Polyurethane60/219, Using solid material in reaction zone149/19.1, Organic material contains polysaccharide resin or synthetic resin149/19.5, Polyester149/36, CONTAINING HYDRAZINE OR HYDRAZINE DERIVATIVE149/109.4MISCELLANEOUS COMPOSITIONSExaminersPrimary: Miller, Edward A.Attorney, Agent or FirmForeign Patent References
International ClassC06B 045/10AbstractHybrid rocket propellants are disclosed that contain azo compounds, i.e., compounds containing the group R--N=N--R' as part of their structure, where R and R' represent a variety of groups including aliphatic, alicyclic and heterocyclic groups. The azo compounds are mixed with the other solid components of the propellant grain and serve either as plasticizers, binders, fuels, or fillers. The effect of including the azo compounds is an increase in the regression rate of the grain as the propellant burns.Other References
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