Robert D. Schad
134Patents
27h-index
70Co-inventors
93Inventor score
Filing activity: May 2, 1977 → Mar 6, 2020
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4444711A | Method of operating a two-shot injection-molding machine | Performing Operations; Transporting | 246 | Expired |
| US4717324A | Coinjection of hollow articles and preforms | Performing Operations; Transporting | 107 | Expired |
| US4588367A | Hot runner manifold for injection molding machine | Performing Operations; Transporting | 88 | Expired |
| US4173448A | Actuating mechanism for gate valve of injection nozzle | Performing Operations; Transporting | 76 | Expired |
| US7198400B2 | Static mixer and a method of manufacture thereof | Performing Operations; Transporting | 67 | Expired |
| US4268240A | Actuating mechanism for gate valve of injection nozzle | Performing Operations; Transporting | 58 | Expired |
| US4836767A | Swing plate molding machine | Performing Operations; Transporting | 58 | Expired |
| US4729732A | Carrying means for holding and cooling a parison | Emerging Cross-Sectional Technologies | 57 | Expired |
| US4863369A | Injection molding with shooting pots | Performing Operations; Transporting | 54 | Expired |
| US4808101A | Tri-injection of hollow articles | Performing Operations; Transporting | 51 | Expired |
| US4931234A | Coinjection of hollow articles and preforms | Performing Operations; Transporting | 48 | Expired |
| US4690633A | Apparatus for preparing hollow plastic articles | Performing Operations; Transporting | 47 | Expired |
| US4268241A | Heated injection nozzle | Performing Operations; Transporting | 47 | Expired |
| US4448741A | Method of molding plastic workpieces about slender permanent inserts | Performing Operations; Transporting | 41 | Expired |
| US4863665A | Tri-injection of hollow articles | Performing Operations; Transporting | 41 | Expired |
| US6168740A | Partial crystallization method of amorphous plastic articles | Emerging Cross-Sectional Technologies | 40 | Expired |
| US5817345A | Turrent article molding machine and method of use | Performing Operations; Transporting | 36 | Expired |
| US4207051A | Stripper mechanism for injection mold | Performing Operations; Transporting | 33 | Expired |
| US4867938A | Sequential injection molding process | Performing Operations; Transporting | 32 | Expired |
| US4209290A | Bottle-molding system | Performing Operations; Transporting | 32 | Expired |
| US5728409A | Turret article molding machine | Performing Operations; Transporting | 31 | Expired |
| US4775308A | Nozzle for coinjection of hollow articles and preforms | Performing Operations; Transporting | 30 | Expired |
| US4422995A | Method and apparatus for molding hollow, slender workpieces | Performing Operations; Transporting | 30 | Expired |
| US4660801A | Mold core including ejection sleeve | Emerging Cross-Sectional Technologies | 29 | Expired |
| US6413075B1 | Partial crystallization apparatus of amorphous plastic articles | Emerging Cross-Sectional Technologies | 29 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.