Ulrich Riegel
65Patents
24h-index
76Co-inventors
91Inventor score
Filing activity: Aug 1, 1980 → Sep 22, 2015
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6472478B1 | Process for crosslinking hydrogels with bis- and poly-2- oxazolidinones | Emerging Cross-Sectional Technologies | 176 | Expired |
| US5331059A | Hydrophilic, highly swellable hydrogels | Emerging Cross-Sectional Technologies | 171 | Expired |
| US6414214B1 | Mechanically stable hydrogel-forming polymers | Chemistry; Metallurgy | 166 | Expired |
| US6657015B1 | Method for the secondary cross-linking of hydrogels with 2-oxotetrahydro-1,3-oxazines | Chemistry; Metallurgy | 157 | Expired |
| US7183360B2 | Method for crosslinking hydrogels with morpholine-2,3-diones | Human Necessities | 157 | Expired |
| US6559239B1 | Method for the secondary cross-linking of hydrogels with N-acyl-2-oxazolidinones | Chemistry; Metallurgy | 157 | Expired |
| US6503979B1 | Method for cross-linking hydrogels with bis- and poly-2-oxazolidinones | Emerging Cross-Sectional Technologies | 145 | Expired |
| US7199211B2 | (Meth)acrylic esters of polyalkoxylated trimethylolpropane | Emerging Cross-Sectional Technologies | 120 | Expired |
| US7772420B2 | (Meth)acrylic esters of monoalkoxylated polyols, and production thereof | Emerging Cross-Sectional Technologies | 109 | Expired |
| US7687596B2 | (Meth)acrylic acid esters of alkyoxylated unsaturated polyol ethers, and production thereof | Chemistry; Metallurgy | 106 | Active |
| US8236715B2 | Absorbent structure with improved water-absorbing material | Emerging Cross-Sectional Technologies | 105 | Active |
| US7652111B2 | (Meth)acrylic acid esters of unsaturated aminoalcohols and preparation thereof | Chemistry; Metallurgy | 104 | Active |
| US7754822B2 | Method for the secondary crosslinking of hydrogels with bicyclic amide acetals | Emerging Cross-Sectional Technologies | 95 | Active |
| US5973014A | Process for the preparation of porous, hydrophilic, highly swellable hydrogels | Chemistry; Metallurgy | 71 | Expired |
| US4309523A | Water-soluble copolymer of acrylamidomethylpropanesulfonic acids salts | Chemistry; Metallurgy | 64 | Expired |
| US5731365A | Hydrophilic, highly swellable hydrogels | Emerging Cross-Sectional Technologies | 60 | Expired |
| US6849665B2 | Absorbent compositions | Emerging Cross-Sectional Technologies | 46 | Expired |
| US7553903B2 | Swellable hydrogel-forming polymers having a low fraction of fines | Emerging Cross-Sectional Technologies | 38 | Expired |
| US4500437A | Water soluble copolymers for use in fracture-acidizing of wells | Emerging Cross-Sectional Technologies | 35 | Expired |
| US4587283A | Cement slurries for deep holes, with a copolymer content for reducing the water loss | Chemistry; Metallurgy | 27 | Expired |
| US7420013B2 | Mixtures of compounds comprising at least two double bonds and use thereof | Chemistry; Metallurgy | 25 | Expired |
| US5510436A | Water-soluble copolymers useful in drilling fluids | Chemistry; Metallurgy | 25 | Expired |
| US5011892A | Hydrophilic swellable graft copolymers, their preparation and use | Human Necessities | 25 | Expired |
| US8518539B2 | Absorbent structures comprising post-crosslinked water-absorbent articles | Emerging Cross-Sectional Technologies | 24 | Active |
| US5041496A | Hydrophilic, swellable graft copolymers, their preparation and use | Human Necessities | 23 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.