Peter K. Herman
125Patents
20h-index
144Co-inventors
93Inventor score
Filing activity: Jan 6, 1989 → Jun 10, 2024
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5472463A | Pressure side integrated air filter and filtering networks for engines | Mechanical Engineering; Lighting; Heating | 216 | Expired |
| US7156991B2 | Liquid additive slow-release apparatus driven by a filter pressure gradient | Mechanical Engineering; Lighting; Heating | 75 | Expired |
| US6139595A | Air/oil coalescer with centrifugally assisted drainage | Mechanical Engineering; Lighting; Heating | 74 | Expired |
| US7153422B2 | Liquid additive slow-release apparatus driven by a filter pressure gradient | Mechanical Engineering; Lighting; Heating | 71 | Expired |
| US6019717A | Nozzle inlet enhancement for a high speed turbine-driven centrifuge | Mechanical Engineering; Lighting; Heating | 64 | Expired |
| US6709575B1 | Extended life combination filter | Mechanical Engineering; Lighting; Heating | 62 | Expired |
| US5637217A | Self-driven, cone-stack type centrifuge | Mechanical Engineering; Lighting; Heating | 56 | Expired |
| US7235177B2 | Integral air/oil coalescer for a centrifuge | Emerging Cross-Sectional Technologies | 54 | Expired |
| US8097061B2 | Elliptical seal interface for filter assembly | Performing Operations; Transporting | 52 | Active |
| US7238216B2 | Variable flow inertial gas-liquid impactor separator | Emerging Cross-Sectional Technologies | 50 | Expired |
| US6017300A | High performance soot removing centrifuge with impulse turbine | Mechanical Engineering; Lighting; Heating | 50 | Expired |
| US7506663B2 | Magnetic check valve | Emerging Cross-Sectional Technologies | 45 | Active |
| US5669366A | Closed crankcase ventilation system | Emerging Cross-Sectional Technologies | 38 | Expired |
| US5795477A | Self-driven, cone-stack type centrifuge | Mechanical Engineering; Lighting; Heating | 36 | Expired |
| US8794222B2 | Crankcase ventilation inside-out flow rotating coalescer | Mechanical Engineering; Lighting; Heating | 36 | Active |
| US6533712B1 | Centrifuge housing with oil fill port | Performing Operations; Transporting | 31 | Expired |
| US5575912A | Self-driven, cone-stack type centrifuge | Mechanical Engineering; Lighting; Heating | 22 | Expired |
| US8114183B2 | Space optimized coalescer | Emerging Cross-Sectional Technologies | 22 | Active |
| US6273031A | Clean lubricant circulation system | Mechanical Engineering; Lighting; Heating | 21 | Expired |
| US6364822B1 | Hero-turbine centrifuge with drainage enhancing baffle devices | Performing Operations; Transporting | 21 | Expired |
| US4893651A | Self-venting drain value assembly | Emerging Cross-Sectional Technologies | 20 | Expired |
| US7648543B2 | Multistage variable impactor | Emerging Cross-Sectional Technologies | 19 | Active |
| US7699029B2 | Crankcase ventilation system with pumped scavenged oil | Mechanical Engineering; Lighting; Heating | 19 | Active |
| US8932465B2 | Filter cartridge having a filter within a filter, and an endplate sealing structure on an outer filter element | Performing Operations; Transporting | 18 | Active |
| US6319402A | Extended life dual full-flow and bypass filter | Emerging Cross-Sectional Technologies | 18 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.