Multiconfiguration reusable space transportation system
Patent 4834324 Issued on May 30, 1989. Estimated Expiration Date: 
July 10, 2006. 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.
July 10, 2006. 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 References 3202381 3369771 3405891 3702688 3881671 3884435 Three stage rocket vehicle with parallel staging Patent #: 4451017 InventorApplicationNo. 06/883979 filed on 07/10/1986US Classes:244/158.9, Reusable or returnable244/2, COMPOSITE AIRCRAFTD12/320Space satellite or habitat (7)ExaminersPrimary: Barefoot, Galen L.Attorney, Agent or FirmInternational ClassesB64G 1/14 (20060101)B64G 1/00 (20060101) B64G 1/64 (20060101) B64G 1/40 (20060101) B64G 1/22 (20060101) AbstractA space transporation system comprises several different modular units usable in a plurality of different configurations for different payloads and space missions. The units include a first stage unit for providing primary propulsive force during launch, a payload carrying unit, which may be an orbital vehicle or simple payload canister, and an auxiliary propulsion unit for providing additional power either during launch or space flight. The units are all demountably securable together, and preferably all include aerodymanic devices such as fixed or swing wings for a controlled return to Earth. The first stage unit can act either as a single-stage-to-orbit vehicle carrying internal or external payload, or as the first stage of a multiple stage launch configuration including a payload unit and auxiliary propulsion units.Other References
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