Inventor · Etten-Leur, NL

Hans-Peter Brack

39Patents
10h-index
60Co-inventors
74Inventor score

Filing activity: Sep 7, 2001 → Apr 13, 2018

Most-cited inventions

PatentTitleAreaCited byStatus
US6437083B1 Process for preparing branched aromatic polycarbonates Chemistry; Metallurgy 222 Expired
US6504002B1 Process for the production of branched melt polycarbonate by late addition of fries-inducing catalyst Chemistry; Metallurgy 71 Expired
US6706846B2 Method for end-capping polycarbonate resins and composition for use in same Chemistry; Metallurgy 36 Expired
US6500914B1 Method for end-capping polycarbonate resins and composition for use in same Chemistry; Metallurgy 30 Expired
US6747119B2 Method and system for preparing a polycarbonate, copolymerization reagent and polycarbonate Chemistry; Metallurgy 28 Expired
US6525163B1 Process for the production of polycarbonate Chemistry; Metallurgy 26 Expired
US6734277B2 Method of enhancing pit replication in optical disks Physics 24 Expired
US6653434B2 Process for the production of polycarbonate Electricity 24 Expired
US6590068B2 Reduction of reaction by-products in polycarbonate resins Chemistry; Metallurgy 23 Expired
US6710156B2 Method for end-capping polycarbonate resins and composition for use in same Chemistry; Metallurgy 23 Expired
US6486294B1 Production of poly(carbonate-co-ester) copolymers Chemistry; Metallurgy 10 Expired
US7645851B2 Polycarbonate with reduced color Chemistry; Metallurgy 7 Active
US7671164B2 Aliphatic polycarbonates, methods of making, and articles formed therefrom Chemistry; Metallurgy 6 Active
US6620902B2 Process for preparing polycarbonate and apparatus for preparing polycarbonate Chemistry; Metallurgy 5 Expired
US7759456B2 Branched polycarbonate resins and processes to prepare the same Chemistry; Metallurgy 4 Active
US8426532B2 Polycarbonate graft copolymers Chemistry; Metallurgy 4 Active
US8058469B2 Method for making carbamates, ureas and isocyanates Chemistry; Metallurgy 4 Active
US7671165B2 Method of forming polycarbonate Performing Operations; Transporting 3 Active
US7619053B2 Monomer solution for producing polycarbonate Emerging Cross-Sectional Technologies 2 Active
US9956500B2 Liquid mixing collector and a method for its use Performing Operations; Transporting 2 Active
US7365149B2 Equipment cleaning in the manufacture of polycarbonates Emerging Cross-Sectional Technologies 2 Active
US7547799B1 Method for producing phenolic compound Chemistry; Metallurgy 2 Active
US7834125B2 Polycarbonates, compositions made therefrom, methods of manufacture thereof, and articles therefrom Chemistry; Metallurgy 2 Active
US8273849B2 Isosorbide-based polycarbonates, method of making, and articles formed therefrom Chemistry; Metallurgy 1 Active
US7858728B2 Polycarbonate resins method of manufacture, and articles formed therefrom Chemistry; Metallurgy 1 Active

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