Nelson E. Kopatz
35Patents
13h-index
15Co-inventors
74Inventor score
Filing activity: Sep 12, 1986 → Jul 3, 2002
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US4731111A | Hydrometallurical process for producing finely divided spherical refractory metal based powders | Performing Operations; Transporting | 86 | Expired |
| US4670047A | Process for producing finely divided spherical metal powders | Performing Operations; Transporting | 47 | Expired |
| US4802915A | Process for producing finely divided spherical metal powders containing an iron group metal and a readily oxidizable metal | Performing Operations; Transporting | 42 | Expired |
| US4731110A | Hydrometallurigcal process for producing finely divided spherical precious metal based powders | Performing Operations; Transporting | 42 | Expired |
| US4772315A | Hydrometallurgical process for producing finely divided spherical maraging steel powders containing readily oxidizable alloying elements | Performing Operations; Transporting | 40 | Expired |
| US4859237A | Hydrometallurgical process for producing spherical maraging steel powders with readily oxidizable alloying elements | Performing Operations; Transporting | 33 | Expired |
| US5114471A | Hydrometallurgical process for producing finely divided spherical maraging steel powders | Performing Operations; Transporting | 31 | Expired |
| US6780219B2 | Method of spheridizing silicon metal powders | Chemistry; Metallurgy | 31 | Expired |
| US4787934A | Hydrometallurgical process for producing spherical maraging steel powders utilizing spherical powder and elemental oxidizable species | Performing Operations; Transporting | 29 | Expired |
| US4778517A | Hydrometallurgical process for producing finely divided copper and copper alloy powders | Performing Operations; Transporting | 26 | Expired |
| US4961770A | Process for producing spherical glass particles | Chemistry; Metallurgy | 16 | Expired |
| US4913731A | Process of making prealloyed tungsten alloy powders | Performing Operations; Transporting | 13 | Expired |
| US4927456A | Hydrometallurgical process for producing finely divided iron based powders | Performing Operations; Transporting | 13 | Expired |
| US5439638A | Method of making flowable tungsten/copper composite powder | Electricity | 11 | Expired |
| US5470549A | Method of making tungsten-copper composite oxides | Electricity | 10 | Expired |
| US4715878A | Process for producing finely divided spherical glass powders | Chemistry; Metallurgy | 10 | Expired |
| US5468457A | Method of making tungsten-copper composite oxides | Electricity | 9 | Expired |
| US4900590A | Method for producing aluminum oxide coated iron powder | Chemistry; Metallurgy | 8 | Expired |
| US4800064A | Process for producing tungsten heavy alloy sheet using hydrometallurgically produced tungsten heavy alloy | Chemistry; Metallurgy | 8 | Expired |
| US4793969A | Process for producing tungsten heavy alloy sheet using high temperature processing techniques | Performing Operations; Transporting | 7 | Expired |
| US5897962A | Method of making flowable tungsten/copper composite powder | Emerging Cross-Sectional Technologies | 7 | Expired |
| US4743297A | Process for producing metal flakes | Emerging Cross-Sectional Technologies | 6 | Expired |
| US4816067A | Process for producing fine spherical particles | Performing Operations; Transporting | 6 | Expired |
| US4808217A | Process for producing fine spherical particles having a low oxygen content | Performing Operations; Transporting | 6 | Expired |
| US4885028A | Process for producing prealloyed tungsten alloy powders | Emerging Cross-Sectional Technologies | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.