Inventor · North Wales, PA, US

Shawn DeFrees

73Patents
31h-index
42Co-inventors
88Inventor score

Filing activity: Jun 29, 1994 → Nov 30, 2015

Most-cited inventions

PatentTitleAreaCited byStatus
US5559103A Bivalent sialyl X saccharides Human Necessities 90 Expired
US7138371B2 Remodeling and glycoconjugation of peptides Chemistry; Metallurgy 90 Expired
US7125843B2 Glycoconjugates including more than one peptide Chemistry; Metallurgy 82 Expired
US5876980A Enzymatic synthesis of oligosaccharides Emerging Cross-Sectional Technologies 79 Expired
US6030815A Enzymatic synthesis of oligosaccharides Emerging Cross-Sectional Technologies 77 Expired
US5922577A Enzymatic synthesis of glycosidic linkages Emerging Cross-Sectional Technologies 75 Expired
US5728554A Enzymatic synthesis of glycosidic linkages Emerging Cross-Sectional Technologies 74 Expired
US7368108B2 Glycopeptide remodeling using amidases Human Necessities 68 Expired
US7439043B2 Galactosyl nucleotide sugars Chemistry; Metallurgy 65 Expired
US7179617B2 Factor IX: remolding and glycoconjugation of Factor IX Human Necessities 65 Expired
US7795210B2 Protein remodeling methods and proteins/peptides produced by the methods Chemistry; Metallurgy 61 Expired
US5604207A Sialyl Le.sup.x analogues as inhibitors of cellular adhesion Chemistry; Metallurgy 59 Expired
US7338933B2 O-linked glycosylation of peptides Chemistry; Metallurgy 57 Expired
US8063015B2 Glycopegylation methods and proteins/peptides produced by the methods Chemistry; Metallurgy 53 Active
US7473680B2 Remodeling and glycoconjugation of peptides Human Necessities 52 Expired
US7276475B2 Remodeling and glycoconjugation of peptides Chemistry; Metallurgy 52 Expired
US7803777B2 Branched water-soluble polymers and their conjugates Human Necessities 51 Active
US7416858B2 Pharmaceutical compositions of glycoconjugates Chemistry; Metallurgy 48 Expired
US7265084B2 Glycopegylation methods and proteins/peptides produced by the methods Chemistry; Metallurgy 48 Expired
US7214660B2 Erythropoietin: remodeling and glycoconjugation of erythropoietin Emerging Cross-Sectional Technologies 47 Expired
US5854218A Sialyl Le.sup.x analogues as inhibitors of cellular adhesion Chemistry; Metallurgy 46 Expired
US7157277B2 Factor VIII remodeling and glycoconjugation of Factor VIII Human Necessities 45 Expired
US7691603B2 Intracellular formation of peptide conjugates Human Necessities 44 Expired
US6440703B1 Enzymatic synthesis of gangliosides Chemistry; Metallurgy 42 Expired
US7265085B2 Glycoconjugation methods and proteins/peptides produced by the methods Human Necessities 42 Expired

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