Inventor · Bartlesville, OK, US

Qing Yang

256Patents
40h-index
105Co-inventors
93Inventor score

Filing activity: Nov 21, 2003 → Oct 17, 2024

Most-cited inventions

PatentTitleAreaCited byStatus
US7884163B2 Silica-coated alumina activator-supports for metallocene catalyst compositions Emerging Cross-Sectional Technologies 286 Active
US7226886B2 Polymerization catalysts and process for producing bimodal polymers in a single reactor Emerging Cross-Sectional Technologies 284 Expired
US7619047B2 Dual metallocene catalysts for polymerization of bimodal polymers Emerging Cross-Sectional Technologies 283 Active
US7294599B2 Acidic activator-supports and catalysts for olefin polymerization Emerging Cross-Sectional Technologies 275 Expired
US7312283B2 Polymerization catalysts and process for producing bimodal polymers in a single reactor Emerging Cross-Sectional Technologies 256 Expired
US7041617B2 Catalyst compositions and polyolefins for extrusion coating applications Emerging Cross-Sectional Technologies 237 Expired
US7517939B2 Polymerization catalysts for producing high molecular weight polymers with low levels of long chain branching Emerging Cross-Sectional Technologies 230 Active
US8309485B2 Methods for producing metal-containing sulfated activator-supports Chemistry; Metallurgy 222 Active
US7026494B1 Polymerization catalysts for producing high melt index polymers without the use of hydrogen Emerging Cross-Sectional Technologies 219 Expired
US8114946B2 Process for producing broader molecular weight distribution polymers with a reverse comonomer distribution and low levels of long chain branches Emerging Cross-Sectional Technologies 209 Active
US8623973B1 Activator supports impregnated with group VIII transition metals for polymer property control Chemistry; Metallurgy 173 Active
US7199073B2 Resins that yield low haze films and the process for their production Emerging Cross-Sectional Technologies 155 Expired
US9023959B2 Methods for producing fluorided-chlorided silica-coated alumina activator-supports and catalyst systems containing the same Emerging Cross-Sectional Technologies 142 Active
US8703886B1 Dual activator-support catalyst systems Chemistry; Metallurgy 134 Active
US7919639B2 Nano-linked heteronuclear metallocene catalyst compositions and their polymer products Emerging Cross-Sectional Technologies 113 Active
US7119153B2 Dual metallocene catalyst for producing film resins with good machine direction (MD) elmendorf tear strength Emerging Cross-Sectional Technologies 107 Expired
US7960487B2 Dual metallocene catalysts for polymerization of bimodal polymers Emerging Cross-Sectional Technologies 100 Active
US8080681B2 Nano-linked metallocene catalyst compositions and their polymer products Emerging Cross-Sectional Technologies 99 Active
US8288487B2 Catalysts for producing broad molecular weight distribution polyolefins in the absence of added hydrogen Chemistry; Metallurgy 82 Active
US7148298B2 Polymerization catalysts for producing polymers with low levels of long chain branching Emerging Cross-Sectional Technologies 81 Expired
US8138113B2 Dual metallocene catalysts for polymerization of bimodal polymers Emerging Cross-Sectional Technologies 71 Active
US8383754B2 Catalyst compositions for producing high Mz/Mw polyolefins Chemistry; Metallurgy 70 Active
US9006367B2 Low density polyolefin resins and films made therefrom Chemistry; Metallurgy 69 Active
US7064225B2 Synthesis of ansa-metallocenes and their parent ligands in high yield Chemistry; Metallurgy 62 Expired
US9169337B2 Polymers with improved ESCR for blow molding applications Chemistry; Metallurgy 61 Active

Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.