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3911078
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Patent number 3,911,078
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Issue date Oct 7, 1975
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3561929
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Patent number 3,561,929
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Issue date Feb 9, 1971
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C01 - INORGANIC CHEMISTRY
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3503719
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Patent number 3,503,719
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Issue date Mar 31, 1970
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C01 - INORGANIC CHEMISTRY
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1424006
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Patent number 1,424,006
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Issue date Jul 25, 1922
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C01 - INORGANIC CHEMISTRY
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1422945
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Patent number 1,422,945
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Issue date Jul 18, 1922
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C01 - INORGANIC CHEMISTRY