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Lubricant for processing of plastics
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Patent number 4,661,163
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Issue date Apr 28, 1987
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Huels Aktiengesellschaft
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Fritz Berke
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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2127811
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Patent number 2,127,811
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Issue date Aug 23, 1938
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...
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2114525
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Patent number 2,114,525
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Issue date Apr 19, 1938
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C10 - PETROLEUM, GAS OR COKE INDUSTRIES TECHNICAL GASES CONTAINING CARBON MON...