Inventor
HSIEH WEN-CHING
US13 patents
⚠️ This page may combine multiple inventors who share the name “HSIEH WEN-CHING”. Patents are grouped by organization below to help distinguish them — per-person disambiguation is on the roadmap.
UNION OIL CO
8 patentsUS4847018AJul 11, 1989
Process for producing petroleum sulfonates
UNION OIL CO29 citations89
US4795772AJan 3, 1989
Enhanced oil recovery composition
UNION OIL CO22 citations81
US4970251ANov 13, 1990
Viscous polymer solution
UNION OIL CO7 citations73
US4836282AJun 6, 1989
Enhanced oil recovery method employing an aqueous polymer
UNION OIL CO18 citations73
US4530400AJul 23, 1985
Process for enhanced oil recovery employing synthetic sulfonates and petroleum sulfonate blends
UNION OIL CO8 citations73
US4446036AMay 1, 1984
Process for enhanced oil recovery employing petroleum sulfonate blends
UNION OIL CO10 citations71
US4753973AJun 28, 1988
Enhanced oil recovery composition
UNION OIL CO6 citations62
US4808648AFeb 28, 1989
Enhanced oil recovery composition
UNION OIL CO1 citations51
QISDA CORP
3 patentsUS7798457B2Sep 21, 2010
Pivot support device and a display apparatus supported thereon
QISDA CORP25 citations92
US7484269B2Feb 3, 2009
Portable device capable of standing and hanging by handle assembly thereof
QISDA CORP11 citations83
US11602057B2Mar 7, 2023
Display device and color correcting method thereof
QISDA CORP0 citations39