Amchem Limited
10Patents
0Active
10Granted
28Portfolio score
Filing activity: Mar 15, 1976 → Mar 5, 2002
Most-cited patents
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4952789A | Machining method and apparatus | Performing Operations; Transporting | 27 | Expired |
| US4188522A | Method of machining a workpiece to a predetermined depth using a machining process in which machine tool wear occurs | Performing Operations; Transporting | 11 | Expired |
| US4994521A | Persulfate activated autodepositing composition | Performing Operations; Transporting | 7 | Expired |
| US4850147A | Electrode shaping | Performing Operations; Transporting | 7 | Expired |
| US4121081A | Apparatus for and method of refeeding electrodes in an electrical discharge machining apparatus | Performing Operations; Transporting | 5 | Expired |
| US6700088B1 | Sealing apparatus | Performing Operations; Transporting | 4 | Expired |
| US4041269A | Cartridge for an electrical discharge machining apparatus | Performing Operations; Transporting | 4 | Expired |
| US5373449A | Method of producing a multi-apertured workpiece | Mechanical Engineering; Lighting; Heating | 4 | Expired |
| US5539648A | Method of producing a mutli-apertured workpiece | Mechanical Engineering; Lighting; Heating | 3 | Expired |
| US4403129A | Fluid actuated electrode clamp | Performing Operations; Transporting | 2 | Expired |
Source: USPTO / EPO open patent data. Counts and citation impact are objective bibliographic measures.