Siebolt Hettinga
38Patents
16h-index
5Co-inventors
74Inventor score
Filing activity: Apr 6, 1976 → Aug 3, 1999
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4743323A | Method of molding a composite article | Performing Operations; Transporting | 44 | Expired |
| US4350193A | Power tool accessory table | Emerging Cross-Sectional Technologies | 42 | Expired |
| US5788332A | Seat unit and cushion | Performing Operations; Transporting | 40 | Expired |
| US6056902A | Method and apparatus for molding a plastic article including injecting based upon a pressure-dominated control algorithm after detecting an indicia of a decrease in the surface area of the melt front | Performing Operations; Transporting | 33 | Expired |
| US4125490A | Method of forming dimensionally stable foamed articles of polyvinyl aromatic resins and resultant product | Emerging Cross-Sectional Technologies | 24 | Expired |
| US4613475A | Clamping structure and method for clamping the mold unit of a mold injection apparatus | Performing Operations; Transporting | 24 | Expired |
| US5773038A | Apparatus for family mold sequential molding | Performing Operations; Transporting | 24 | Expired |
| US5139714A | Process for injection molding a hollow plastic article | Performing Operations; Transporting | 23 | Expired |
| US5275764A | Method of molding a vehicle lamp assembly | Performing Operations; Transporting | 22 | Expired |
| US5898591A | Article of manufacture having computer readable program code for molding an article and method of molding an article by providing computer readable program code | Performing Operations; Transporting | 22 | Expired |
| US5945053A | Extruded-in fabric hinge and method of making same | Performing Operations; Transporting | 22 | Expired |
| US5853630A | Low pressure method for injection molding a plastic article | Performing Operations; Transporting | 20 | Expired |
| US5336460A | Process for making molded-in lamina hinge | Performing Operations; Transporting | 19 | Expired |
| US5902525A | Method of molding a plastic article including injecting based upon a pressure-dominated control algorithm after detecting an indicia of a decrease in the surface area of the melt front | Performing Operations; Transporting | 18 | Expired |
| US6129870A | Method for controlling skin thickness of plastic article made with controlled density | Performing Operations; Transporting | 17 | Expired |
| US4307057A | Method for aligning an injection mold with a nozzle at the mold injection station | Performing Operations; Transporting | 17 | Expired |
| US5437823A | Method for molding a plastic article of varied density | Performing Operations; Transporting | 14 | Expired |
| US5151237A | Method of injection molding a flat deformable laminate | Performing Operations; Transporting | 12 | Expired |
| US5762852A | Process for making molded-in lamina hinge | Performing Operations; Transporting | 12 | Expired |
| US6149998A | Heat laminated fabric hinge and method of making same | Emerging Cross-Sectional Technologies | 12 | Expired |
| US6146562A | Method of injection molding an article with a cellular density distribution which gradually varies between a high density cellular exterior and a low density cellular interior | Performing Operations; Transporting | 10 | Expired |
| US4397806A | Method and apparatus for mold injection | Performing Operations; Transporting | 9 | Expired |
| USD282847S | Tilt and rotate base for a display monitor | General | 9 | Expired |
| US5380186A | Flow regulating assembly for a plastic injection machine | Performing Operations; Transporting | 9 | Expired |
| US5618487A | Multi-clamp mold and method for clamping an injection mold assembly | Performing Operations; Transporting | 8 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.