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Landfill gas recovery
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Patent number 5,842,357
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Issue date Dec 1, 1998
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Acrion Technologies, Inc.
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Lawrence A. Siwajek
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C07 - ORGANIC CHEMISTRY
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Landfill gas recovery
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Patent number 5,681,360
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Issue date Oct 28, 1997
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Acrion Technologies, Inc.
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Lawrence A. Siwajek
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C07 - ORGANIC CHEMISTRY
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Sulfur recovery process
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Patent number 5,021,232
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Issue date Jun 4, 1991
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CNG Research Company
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Ralph E. Hise
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C01 - INORGANIC CHEMISTRY
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Crystallization process
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Patent number 4,623,372
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Issue date Nov 18, 1986
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CNG Research Company
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Robert J. Adler
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B01 - PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL