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Associative thickeners for aqueous systems
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Patent number 7,495,050
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Issue date Feb 24, 2009
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Lubrizol Advanced Materials, Inc.
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John Ta-Yuan Lai
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C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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Lubricating oil composition
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Patent number 4,927,552
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Issue date May 22, 1990
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Ethyl Petroleum Additives, Inc.
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William Y. Lam
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C07 - ORGANIC CHEMISTRY
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Norbornyl dithiocarbamates
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Patent number 4,876,375
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Issue date Oct 24, 1989
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Ethyl Petroleum Additives, Inc.
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William Y. Lam
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C07 - ORGANIC CHEMISTRY
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