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Wen-Ching Hsieh

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  • Chino Hills, CA, US
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Patents Grantslast 30 patents

  • Information Patent Grant

    Viscous polymer solution
    • Patent number 4,970,251
    • Issue date Nov 13, 1990
    • Union Oil Company of California
    • Wen-Ching Hsieh
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for producing petroleum sulfonates
    • Patent number 4,847,018
    • Issue date Jul 11, 1989
    • Union Oil Company of California
    • Jeffery W. Koepke
    • C07 - ORGANIC CHEMISTRY
  • Information Patent Grant

    Enhanced oil recovery method employing an aqueous polymer
    • Patent number 4,836,282
    • Issue date Jun 6, 1989
    • Union Oil Company of California
    • Wen-Ching Hsieh
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Enhanced oil recovery composition
    • Patent number 4,808,648
    • Issue date Feb 28, 1989
    • Union Oil Company of California
    • Wen-Ching Hsieh
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Enhanced oil recovery composition
    • Patent number 4,795,772
    • Issue date Jan 3, 1989
    • Union Oil Company of California
    • Wen-Ching Hsieh
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Enhanced oil recovery composition
    • Patent number 4,753,973
    • Issue date Jun 28, 1988
    • Union Oil Company of California
    • Wen-Ching Hsieh
    • C08 - ORGANIC MACROMOLECULAR COMPOUNDS THEIR PREPARATION OR CHEMICAL WORKING-...
  • Information Patent Grant

    Process for enhanced oil recovery employing synthetic sulfonates an...
    • Patent number 4,530,400
    • Issue date Jul 23, 1985
    • Union Oil Company of California
    • Wen-Ching Hsieh
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...
  • Information Patent Grant

    Process for enhanced oil recovery employing petroleum sulfonate blends
    • Patent number 4,446,036
    • Issue date May 1, 1984
    • Union Oil Company of California
    • Wen-Ching Hsieh
    • C09 - DYES PAINTS POLISHES NATURAL RESINS ADHESIVES MISCELLANEOUS COMPOSITION...