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3791815
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Patent number 3,791,815
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Issue date Feb 12, 1974
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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3088800
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Patent number 3,088,800
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Issue date May 7, 1963
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2980724
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Patent number 2,980,724
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Issue date Apr 18, 1961
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C07 - ORGANIC CHEMISTRY
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2869980
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Patent number 2,869,980
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Issue date Jan 20, 1959
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...
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2869979
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Patent number 2,869,979
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Issue date Jan 20, 1959
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C22 - METALLURGY FERROUS OR NON-FERROUS ALLOYS TREATMENT OF ALLOYS OR NON-FER...