HPM Corporation
39Patents
0Active
39Granted
35Portfolio score
Filing activity: Oct 21, 1974 → Sep 25, 1998
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4173417A | Extrusion apparatus and method | Performing Operations; Transporting | 46 | Expired |
| US4816197A | Adaptive process control for injection molding | Performing Operations; Transporting | 43 | Expired |
| US4125585A | Process employing coextrusion feedblock | Performing Operations; Transporting | 40 | Expired |
| US4277182A | Extruder with short cycle multichannel wave screw | Performing Operations; Transporting | 39 | Expired |
| US4208175A | Coextrusion feedblock and process | Performing Operations; Transporting | 38 | Expired |
| US5035509A | Multi-channel extrusion screw with a zig-zag undercut barrier | Performing Operations; Transporting | 32 | Expired |
| US4146601A | Injection molding process control | Performing Operations; Transporting | 31 | Expired |
| US4299792A | Injection molding process utilizing low shear screw | Performing Operations; Transporting | 21 | Expired |
| US4161380A | Injection molding process control | Performing Operations; Transporting | 21 | Expired |
| US4306848A | Injection molding apparatus having low shear screw | Performing Operations; Transporting | 18 | Expired |
| US4387834A | Combination thermoplastic and glass loaded thermosetting injection molding machine and method for operating same | Performing Operations; Transporting | 18 | Expired |
| US4074362A | Vented injection molding machine | Performing Operations; Transporting | 17 | Expired |
| US4850217A | Adaptive process control for injection molding | Performing Operations; Transporting | 16 | Expired |
| US4925313A | Mixing screw for extrusion and injection molding | Performing Operations; Transporting | 15 | Expired |
| US4356140A | Extrusion method with short cycle multichannel wave screw | Performing Operations; Transporting | 15 | Expired |
| US4285600A | Injection molding machine with multichannel wave screw | Performing Operations; Transporting | 14 | Expired |
| US6056430A | Plasticating apparatus having a multichannel wave screw with a cross channel solids transition | Performing Operations; Transporting | 13 | Expired |
| US4421467A | Injection molding machine diagnostic system | Performing Operations; Transporting | 11 | Expired |
| US4112519A | Vented injection molding machine and method | Emerging Cross-Sectional Technologies | 11 | Expired |
| US4342717A | Injection moulding method and apparatus with mould runner reservoir and shot extension | Performing Operations; Transporting | 10 | Expired |
| US5219590A | Triple channel wave screw | Performing Operations; Transporting | 9 | Expired |
| US5565224A | Electric injection molding machine | Performing Operations; Transporting | 9 | Expired |
| US5375992A | Triple channel wave screw | Performing Operations; Transporting | 8 | Expired |
| US4886106A | Die cast machine with a turret | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4997358A | Apparatus for reconfiguring finishing rolls in a plastic sheet fabrication sheetline | Emerging Cross-Sectional Technologies | 7 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.