Inventor · Wheaton, IL, US

James Spanswick

35Patents
11h-index
24Co-inventors
75Inventor score

Filing activity: Apr 30, 1975 → Jun 26, 2020

Most-cited inventions

PatentTitleAreaCited byStatus
US7056455B2 Process for the preparation of nanostructured materials Emerging Cross-Sectional Technologies 188 Expired
US8367051B2 Preparation of functional gel particles with a dual crosslink network Chemistry; Metallurgy 68 Active
US7795355B2 Preparation of functional polymers Chemistry; Metallurgy 63 Active
US7893173B2 Polymerization process with catalyst reactivation Emerging Cross-Sectional Technologies 29 Active
US6642407B2 Production, purification and polymerization of aromatic dicarboxylic acids Chemistry; Metallurgy 27 Expired
US4713438A Amide and/or imide containing polymers and monomers for the preparation thereof Chemistry; Metallurgy 24 Expired
US7893174B2 Atom transfer radical polymerization process Chemistry; Metallurgy 20 Active
US8404788B2 Atom transfer radical polymerization process Chemistry; Metallurgy 19 Active
US8173750B2 Star macromolecules for personal and home care Chemistry; Metallurgy 18 Active
US8252880B2 Atom transfer dispersion polymerization Chemistry; Metallurgy 15 Active
US8604132B2 Rheology modifying star macrmolecules for fracking fluids and home care Chemistry; Metallurgy 13 Active
US4925916A Amide and/or imide containing polymers and monomers for the preparation thereof Chemistry; Metallurgy 10 Expired
US8962764B2 Preparation of functional star macromolecules Chemistry; Metallurgy 10 Active
US8569421B2 Star macromolecules for personal and home care Chemistry; Metallurgy 8 Active
US5032667A Amide and/or imide containing polymers and monomers for the preparation thereof Chemistry; Metallurgy 6 Expired
US4101510A Fire retardant polymer Chemistry; Metallurgy 5 Expired
US3989771A Rubbermodified styrene polymers Chemistry; Metallurgy 5 Expired
US4302382A Color stable aromatic polyesters Chemistry; Metallurgy 5 Expired
US9399694B2 Star macromolecules for personal and home care Chemistry; Metallurgy 4 Active
US3957915A Translucent impact polystyrene Chemistry; Metallurgy 4 Expired
US4271311A Esterification of phenol catalyzed with a strong base plus boron Chemistry; Metallurgy 3 Expired
US8815971B2 Control over controlled radical polymerization processes Chemistry; Metallurgy 3 Active
US10696798B2 Star macromolecules for personal and home care Chemistry; Metallurgy 2 Active
US8822610B2 Control over controlled radical polymerization processes Emerging Cross-Sectional Technologies 2 Active
US9518136B2 Control over reverse addition fragmentation transfer polymerization processes Chemistry; Metallurgy 2 Active

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