Helmut Eckardt
35Patents
13h-index
20Co-inventors
81Inventor score
Filing activity: Sep 7, 1973 → Apr 15, 2011
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US3947177A | Apparatus for injection molding of multi-layer bodies of thermoplastic | Emerging Cross-Sectional Technologies | 60 | Expired |
| US5093053A | Method of manufacturing multiple-layer molded articles of thermoplastic material | Performing Operations; Transporting | 53 | Expired |
| US4078875A | Injection molding | Emerging Cross-Sectional Technologies | 40 | Expired |
| US4376625A | Injection-molding apparatus for making objects of two different resins | Performing Operations; Transporting | 33 | Expired |
| US5047183A | Method of injection molding articles of thermoplastic materials | Performing Operations; Transporting | 31 | Expired |
| US4210616A | Apparatus for forming plastic | Emerging Cross-Sectional Technologies | 27 | Expired |
| US6451230B1 | Method for injection molding molded parts from thermoplastic and added fluid | Emerging Cross-Sectional Technologies | 26 | Expired |
| US5759459A | Method for producing plastic objects | Performing Operations; Transporting | 24 | Expired |
| US5466141A | Device for injection molding articles of plastics material which contain hollow spaces | Performing Operations; Transporting | 20 | Expired |
| US3945535A | Injection molding apparatus | Performing Operations; Transporting | 16 | Expired |
| US4944909A | Method for manufacturing multilayer molded articles | Emerging Cross-Sectional Technologies | 15 | Expired |
| US5656215A | Process for injection molding objects having at least two different layers | Emerging Cross-Sectional Technologies | 14 | Expired |
| US3937447A | Injection molding apparatus | Emerging Cross-Sectional Technologies | 14 | Expired |
| US5169648A | Apparatus for injection molding articles of thermoplastic materials | Performing Operations; Transporting | 12 | Expired |
| US5882559A | Process for injection molding objects having at least two different layers | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6468464B1 | Method and apparatus for injection molding parts | Performing Operations; Transporting | 11 | Expired |
| US4134687A | Control of plastic injection | Emerging Cross-Sectional Technologies | 10 | Expired |
| US6143237A | Method and apparatus for producing plastic objects with solid sections and hollow sections | Performing Operations; Transporting | 10 | Expired |
| US6294126A | Process for controlling gas blanket extent in plastics injection molding | Performing Operations; Transporting | 7 | Expired |
| US6254813A | Method and apparatus for injection molding plastic objects comprised of at least two different materials | Performing Operations; Transporting | 7 | Expired |
| US5645866A | Pressure controlling and/or regulating device for a fluid medium, in particular air or gas | Performing Operations; Transporting | 7 | Expired |
| US5667819A | Apparatus for injection molding of multi-layer objects | Performing Operations; Transporting | 5 | Expired |
| US6019935A | Method for injection molding of molded parts of thermoplastic material | Performing Operations; Transporting | 5 | Expired |
| US5776412A | Method and apparatus for producing plastic objects with solid sections and hollow sections | Performing Operations; Transporting | 4 | Expired |
| US6630085B1 | Method for the multicomponent injection molding of plastic parts | Performing Operations; Transporting | 4 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.