having sulfur in addition to phosphorus

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    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
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    Synergistic polyether thickeners for water-based hydraulic fluids

    • Patent number 4,312,768
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    3872060

    • Patent number 3,872,060
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    3417060

    • Patent number 3,417,060
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    3417036

    • Patent number 3,417,036
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