Patent assignee · US · COMPANY

Enzon, Inc.

100Patents
0Active
100Granted
44Portfolio score

Filing activity: Apr 19, 1990 → Aug 10, 2004

Most-cited patents

PatentTitleAreaCited byStatus
US5643575A Non-antigenic branched polymer conjugates Chemistry; Metallurgy 594 Expired
US5122614A Active carbonates of polyalkylene oxides for modification of polypeptides Human Necessities 501 Expired
US5260203A Single polypeptide chain binding molecules Chemistry; Metallurgy 435 Expired
US5219564A Poly(alkylene oxide) amino acid copolymers and drug carriers and charged copolymers based thereon Emerging Cross-Sectional Technologies 304 Expired
US6113906A Water-soluble non-antigenic polymer linkable to biologically active material Chemistry; Metallurgy 298 Expired
US5612460A Active carbonates of polyalkylene oxides for modification of polypeptides Human Necessities 294 Expired
US5919455A Non-antigenic branched polymer conjugates Chemistry; Metallurgy 257 Expired
US5324844A Active carbonates of polyalkylene oxides for modification of polypeptides Human Necessities 246 Expired
US5681567A Method of preparing polyalkylene oxide carboxylic acids Chemistry; Metallurgy 184 Expired
US5614549A High molecular weight polymer-based prodrugs Chemistry; Metallurgy 182 Expired
US5840900A High molecular weight polymer-based prodrugs Chemistry; Metallurgy 177 Expired
US5880131A High molecular weight polymer-based prodrugs Chemistry; Metallurgy 173 Expired
US5567422A Azlactone activated polyalkylene oxides conjugated to biologically active nucleophiles Emerging Cross-Sectional Technologies 171 Expired
US5711944A Interferon polymer conjugates Human Necessities 163 Expired
US5808096A Process for preparing active carbonates of polyalkylene oxides for modification of polypeptides Human Necessities 161 Expired
US5824701A Taxane-based prodrugs Chemistry; Metallurgy 155 Expired
US5985263A Substantially pure histidine-linked protein polymer conjugates Human Necessities 154 Expired
US6153655A Terminally-branched polymeric linkers and polymeric conjugates containing the same Chemistry; Metallurgy 153 Expired
US5738846A Interferon polymer conjugates and process for preparing the same Human Necessities 139 Expired
US5637749A Aryl imidate activated polyalkylene oxides Chemistry; Metallurgy 129 Expired
US6127355A High molecular weight polymer-based prodrugs Chemistry; Metallurgy 127 Expired
US6180095A Polymeric prodrugs of amino- and hydroxyl-containing bioactive agents Human Necessities 123 Expired
US6011042A Acyl polymeric derivatives of aromatic hydroxyl-containing compounds Chemistry; Metallurgy 122 Expired
US5965566A High molecular weight polymer-based prodrugs Chemistry; Metallurgy 116 Expired
US5869620A Multivalent antigen-binding proteins Chemistry; Metallurgy 109 Expired

Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.