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Self-cleaning vacuum purge system
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Patent number 6,341,615
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Issue date Jan 29, 2002
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Air Products and Chemicals, Inc.
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Robert Sam Zorich
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
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Solvent purge mechanism
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Patent number 6,138,691
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Issue date Oct 31, 2000
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Air Products and Chemicals, Inc.
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George Oleg Voloshin
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B08 - CLEANING
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Solvent purge mechanism
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Patent number 5,964,230
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Issue date Oct 12, 1999
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Air Products and Chemicals, Inc.
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George Oleg Voloshin
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B08 - CLEANING