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Pressless injection molding
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Patent number 4,014,974
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Issue date Mar 29, 1977
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Hercules Incorporated
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Lawrence C. Cessna
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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Pressless injection molding apparatus
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Patent number 3,972,668
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Issue date Aug 3, 1976
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Hercules Incorporated
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Lawrence C. Cessna
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3762848
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Patent number 3,762,848
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Issue date Oct 2, 1973
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL
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3602947
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Patent number 3,602,947
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Issue date Sep 7, 1971
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B29 - WORKING OF PLASTICS WORKING OF SUBSTANCES IN A PLASTIC STATE, IN GENERAL