Gerd Ehrmann
14Patents
7h-index
42Co-inventors
62Inventor score
Filing activity: Apr 24, 1989 → Dec 10, 2004
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4940629A | Fiber reinforced thermoplastic integral skin foams and manufacture thereof | Emerging Cross-Sectional Technologies | 20 | Expired |
| US6420442B1 | Flame-proofed polystyrene foamed materials | Emerging Cross-Sectional Technologies | 13 | Expired |
| US6444714B1 | Method for producing expandable polystyrene particles | Chemistry; Metallurgy | 13 | Expired |
| US6703431B2 | Flexible open-celled microcellular polymer foams | Chemistry; Metallurgy | 12 | Expired |
| US7045082B2 | Production of foam webs from high-temperature-resistant polysulfones or polyether sulfones | Chemistry; Metallurgy | 11 | Expired |
| US6521672B1 | Open-cell particulate foams | Chemistry; Metallurgy | 11 | Expired |
| US5091126A | Preparation of expandable granules, and the production of foams therefrom | Chemistry; Metallurgy | 8 | Expired |
| US5744505A | Prefoamed polyolefin beads produced by extrusion | Chemistry; Metallurgy | 6 | Expired |
| US6498232B1 | Method for coagulating plastics dispersions using a device with shearing elements | Performing Operations; Transporting | 5 | Expired |
| US6448300B1 | Expandable olefin bead polymers | Chemistry; Metallurgy | 4 | Expired |
| US6476089B1 | Expandable olefin bead polymers | Chemistry; Metallurgy | 3 | Expired |
| US7776244B2 | Method for producing expandable polystyrene | Chemistry; Metallurgy | 2 | Expired |
| US6727291B2 | Preparation of expandable propylene polymer beads | Chemistry; Metallurgy | 1 | Expired |
| US7868053B2 | Expandable polystyrene granulates with a bi- or multi-modal molecular-weight distribution | Chemistry; Metallurgy | 1 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.