Patents by Inventor William E. Quist
William E. Quist has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Patent number: 5160555Abstract: An aluminum-lithium alloy exhibiting good fracture toughness and relatively high strength has a nominal composition of 2.5 percent lithium, 1.0 percent magnesium, 1.6 percent copper, 0.12 percent zirconium with the balance being aluminum and trace elements.Type: GrantFiled: February 27, 1991Date of Patent: November 3, 1992Assignee: The Boeing CompanyInventors: G. Hari Narayanan, William E. Quist
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Patent number: 5133930Abstract: An aluminum-lithium alloy exhibiting good fracture toughness and relatively high strength has a nominal composition of 2.2 percent lithium, 0.6 percent magnesium, 2.5 percent copper, 0.12 percent zirconium with the balance being aluminum and trace elements.Type: GrantFiled: March 9, 1990Date of Patent: July 28, 1992Assignee: The Boeing CompanyInventors: G. Hari Narayanan, R. Eugene Curtis, William E. Quist, Michael V. Hyatt, Sven E. Axter
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Patent number: 5116572Abstract: An aluminum-lithium alloy exhibiting good fracture toughness and relatively high strength has a nominal composition of 2.2 percent lithium, 0.6 percent magnesium, 2.5 percent copper, 0.12 percent zirconium with the balance being aluminum and trace elements.Type: GrantFiled: August 28, 1989Date of Patent: May 26, 1992Assignee: The Boeing CompanyInventors: G. Hari Narayanan, R. Eugene Curtis, William E. Quist, Michael V. Hyatt, Sven E. Axter
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Patent number: 4999061Abstract: The combination of strength and fracture toughness properties of aluminum-lithium alloys are significantly enhanced by underaging the alloys at temperatures ranging from 200.degree. F. to below 305.degree. F. for relatively long periods of time.Type: GrantFiled: April 14, 1989Date of Patent: March 12, 1991Assignee: The Boeing CompanyInventors: R. Eugene Curtis, G. Hari Narayanan, William E. Quist
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Patent number: 4840682Abstract: The combination of strength and fracture toughness properties of aluminum-lithium alloys are significantly enhanced by underaging the alloys at temperatures ranging from 200.degree. F. to below 300.degree. F. for relatively long periods of time.Type: GrantFiled: November 21, 1985Date of Patent: June 20, 1989Assignee: The Boeing CompanyInventors: R. Eugene Curtis, G. Hari Narayanan, William E. Quist
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Patent number: 4735774Abstract: An aluminum-lithium alloy exhibiting good fracture toughness and relatively high strength has a nominal composition of 2.5 percent lithium, 1.0 percent magnesium, 1.6 percent copper, 0.12 percent zirconium with the balance being aluminum and trace elements.Type: GrantFiled: December 30, 1983Date of Patent: April 5, 1988Assignee: The Boeing CompanyInventors: G. Hari Narayanan, William E. Quist, R. Eugene Curtis
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Patent number: 4603029Abstract: An aluminum-lithium alloy exhibiting good fracture toughness and relatively high strength has a nominal composition of 2.5 percent lithium, 0.6 percent magnesium, 1.8 percent copper, 0.12 percent zirconium with the balance being aluminum and trace elements.Type: GrantFiled: March 13, 1985Date of Patent: July 29, 1986Assignee: The Boeing CompanyInventors: William E. Quist, R. Eugene Curtis, G. Hari Narayanan
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Patent number: 4336075Abstract: A 2000 series aluminum alloy characterized by high strength, high fatigue resistance, and high fracture toughness consists essentially of 4.2 to 4.7 percent copper, 1.3 to 1.8 percent magnesium, 0.8 to 1.3 percent manganese, 0.08 to 0.15 percent zirconium, maximums of 0.15 percent iron, 0.12 percent silicon, 0.25 percent zinc, 0.15 percent titanium, 0.10 percent chromium, 0.05 percent of each of any other trace elements present, and a maximum total of such other trace elements of 0.15 percent, the balance of the alloy being aluminum. The foregoing alloy is hot-worked and heat-treated to yield a final wrought product having a highly elongated and substantially unrecrystallized microstructure.Type: GrantFiled: December 28, 1979Date of Patent: June 22, 1982Assignee: The Boeing CompanyInventors: William E. Quist, Michael V. Hyatt, Sven E. Axter
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Patent number: 4305763Abstract: A 7000 series aluminum alloy characterized by high strength, high fatigue resistance and high fracture toughness consists essentially of 5.9 to 6.9% zinc, 2.0 to 2.7% magnesium, 1.9 to 2.5% copper, 0.08 to 0.15% zirconium, a maximum of 0.15% iron, a maximum of 0.12% silicon, a maximum of 0.06% titanium, a maximum of 0.04% chromium, a maximum of 0.05% for each of any other trace elements present in the alloy, the total of the other trace elements in the alloy being a maximum of 0.15%, the balance of the alloy being aluminum. The foregoing alloy is hot worked to provide a wrought product, such as an extruded or plate product, in which recrystallization is held to a minimum. The wrought product is subjected to a solution treatment, quench, and elevated temperature aging cycle, normally until the product is at or near its maximum strength.Type: GrantFiled: September 29, 1978Date of Patent: December 15, 1981Assignee: The Boeing CompanyInventors: William E. Quist, Michael V. Hyatt
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Patent number: 4294625Abstract: A 2000 series aluminum alloy characterized by high strength, very high fatigue resistance, and very high fracture toughness consists essentially of 3.8% to 4.4% copper, 1.2% to 1.8% magnesium, 0.3% to 0.9% manganese, maximums of 0.12% silicon, 0.15% iron, 0.25% zinc, 0.15% titanium, 0.10% chromium, 0.05% of each of any other trace elements present, and a maximum total of such other trace elements of 0.15%, the balance of the alloy being aluminum. It is preferred, especially for plate products, that the maximum iron and silicon levels be restricted to 0.12% and 0.10%, respectively. For extruded products, the foregoing alloy is hot worked to yield a wrought product having a substantially unrecrystallized structure. For plate products, the alloy is subjected to room temperature preaging and a cold rolling treatment to provide a reduction in gauge of from 9% to 13%.Type: GrantFiled: April 18, 1980Date of Patent: October 13, 1981Assignee: The Boeing CompanyInventors: Michael V. Hyatt, William E. Quist
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Patent number: RE34008Abstract: A 7000 series aluminum alloy characterized by high strength, high fatigue resistance and high fracture toughness consists essentially of 5.9 to 6.9% zinc, 2.0 to 2.7% magnesium, 1.9 to 2.5% copper, 0.08 to 0.15% zirconium, a maximum of 0.15% iron, maximum of 0.12% silicon, a maximum of 0.06% titanium, a maximum of 0.04% chromium, a maximum of 0.05% for each of any other trace elements present in the alloy, the total of the other trace elements in the allow being a maximum of 0.15%, the balance of the alloy being aluminum. The foregoing alloy is hot worked to provide a wrought product, such as an extruded or plate product, in which recrystallization is held to a minimum. The wrought product is subjected to a solution treatment, quench, and elevated temperature aging cycle, normally until the product is at or near its maximum strength.Type: GrantFiled: July 20, 1987Date of Patent: July 28, 1992Assignee: The Boeing CompanyInventors: William E. Quist, Michael V. Hyatt