High temperature corrosion resistant composite structure
Patent 4917968 Issued on April 17, 1990. Estimated Expiration Date: 
April 15, 2008. 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.
April 15, 2008. 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 3470017 3540863 3753666 Erosion-resistant coating system Patent #: 4761346 InventorsApplicationNo. 182127 filed on 04/15/1988US Classes:428/621, With additional, spatially distinct nonmetal component428/610, Having composition, density, or hardness gradient428/632, Oxide-containing component428/660, Refractory (Group IVB, VB, or VIB) metal-base component428/661, Diverse refractory group metal-base components: alternative to or next to each other428/668, Group VIII or IB metal-base component428/670Platinum group metal-base componentExaminersPrimary: Rutledge, L. DewayneAssistant: Wyszomierski, George Attorney, Agent or FirmInternational ClassB32B 015/0AbstractA structure which is resistant to corrosion at high temperatures comprises a ductile layer of a platinum group metal, such as iridium, and a layer of a refractory metal having a high strength at high temperatures, such as rhenium. A solid solution of the two metals is present between and metallurgically bonded to the two metal layers. Further, the structure may include a layer of ceramic such as zirconia or hafnia on the exposed face of the platinum group metal layer.Other References
Field of SearchHaving composition, density, or hardness gradientBoride, carbide or nitride component Oxide-containing component Refractory (Group IVB, VB, or VIB) metal-base component Diverse refractory group metal-base components: alternative to or next to each other Group VIII or IB metal-base component Platinum group metal-base component With additional, spatially distinct nonmetal component | |
