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3589917
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Patent number 3,589,917
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Issue date Jun 29, 1971
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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2803561
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Patent number 2,803,561
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Issue date Aug 20, 1957
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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2732390
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Patent number 2,732,390
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Issue date Jan 24, 1956
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C07 - ORGANIC CHEMISTRY
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2729572
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Patent number 2,729,572
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Issue date Jan 3, 1956
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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2711967
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Patent number 2,711,967
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Issue date Jun 28, 1955
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C04 - CEMENTS CONCRETE ARTIFICIAL STONE CERAMICS REFRACTORIES
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2441423
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Patent number 2,441,423
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Issue date May 11, 1948
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...
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2441422
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Patent number 2,441,422
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Issue date May 11, 1948
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D06 - TREATMENT OF TEXTILES OR THE LIKE LAUNDERING FLEXIBLE MATERIALS NOT OTH...