Norbert Herfert
46Patents
13h-index
72Co-inventors
84Inventor score
Filing activity: Jul 19, 1995 → Apr 9, 2019
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6414214B1 | Mechanically stable hydrogel-forming polymers | Chemistry; Metallurgy | 166 | Expired |
| US5973014A | Process for the preparation of porous, hydrophilic, highly swellable hydrogels | Chemistry; Metallurgy | 71 | Expired |
| US5731365A | Hydrophilic, highly swellable hydrogels | Emerging Cross-Sectional Technologies | 60 | Expired |
| US6565768B1 | Method for producing water-swellable hydorphilic polymers, said polymers and use thereof | Emerging Cross-Sectional Technologies | 48 | Expired |
| US6849665B2 | Absorbent compositions | Emerging Cross-Sectional Technologies | 46 | Expired |
| US6297335A | Crosslinked, hydrophilic, highly swellable hydrogels, production thereof and use thereof | Chemistry; Metallurgy | 46 | Expired |
| US6641064B1 | Complete drying method for hydrogels | Chemistry; Metallurgy | 37 | Expired |
| US5840321A | Hydrophilic, highly swellable hydrogels | Chemistry; Metallurgy | 27 | Expired |
| US6602950B1 | Hydrophilic hydrogels with a high swelling capacity and method for producing and using them | Emerging Cross-Sectional Technologies | 27 | Expired |
| US7396584B2 | Crosslinked polyamine coating on superabsorbent hydrogels | Emerging Cross-Sectional Technologies | 24 | Expired |
| US6800666B2 | Hydrophilic, open-cell, elastic foams with a melamine/formaldehyde resin base, production thereof and use thereof in hygiene products | Chemistry; Metallurgy | 16 | Expired |
| US5945495A | Use of surfactants in the drying of hydrophilic highly swellable hydrogels | Chemistry; Metallurgy | 15 | Expired |
| US7504551B2 | Color-stable superabsorbent polymer composition | Emerging Cross-Sectional Technologies | 13 | Expired |
| US7144957B2 | Polymer mixture of hydrogels with different pH value | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6107432A | Water-swellable, hydrophilic polymer compositions | Chemistry; Metallurgy | 12 | Expired |
| US7662460B2 | Plasticized superabsorbent polymer sheets and use thereof in hygienic articles | Emerging Cross-Sectional Technologies | 11 | Expired |
| US7329701B2 | Superabsorbent polymers and method of manufacturing the same | Chemistry; Metallurgy | 10 | Expired |
| US7528291B2 | Color-stable superabsorbent polymer composition | Emerging Cross-Sectional Technologies | 10 | Expired |
| US9073040B2 | Water-absorbent polymer particles | Emerging Cross-Sectional Technologies | 7 | Active |
| US8017549B2 | Superabsorbents having superior permeability and conveying properties | Emerging Cross-Sectional Technologies | 7 | Active |
| US8865828B2 | Method for producing permeable water-absorbing polymer particles through polymerization of drops of a monomer solution | Chemistry; Metallurgy | 6 | Active |
| US6828354B2 | Hydrophilic open-cell, elastic foams with a melamine/formaldehyde resin base, production thereof and use thereof in hygiene products | Chemistry; Metallurgy | 6 | Expired |
| US7915363B2 | Acidic superabsorbent hydrogels | Emerging Cross-Sectional Technologies | 5 | Active |
| US8552071B1 | Hydrogels absorbing aqueous fluids | Chemistry; Metallurgy | 3 | Expired |
| US7790823B2 | Acidic superabsorbent hydrogels | Emerging Cross-Sectional Technologies | 3 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.