Michael Evans
39Patents
16h-index
46Co-inventors
81Inventor score
Filing activity: Oct 3, 1978 → Feb 2, 2017
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US5804820A | Method for determining density of an earth formation | Physics | 78 | Expired |
| US5250806A | Stand-off compensated formation measurements apparatus and method | Physics | 68 | Expired |
| US5513528A | Logging while drilling method and apparatus for measuring standoff as a function of angular position within a borehole | Fixed Constructions | 65 | Expired |
| US5937198A | Field configurable embedded computer system | Physics | 64 | Expired |
| US5473158A | Logging while drilling method and apparatus for measuring formation characteristics as a function of angular position within a borehole | Fixed Constructions | 62 | Expired |
| US5608215A | Method and apparatus for determining density of earth formations | Physics | 59 | Expired |
| US5812857A | Field configurable embedded computer system | Physics | 58 | Expired |
| USD357810S | Combined pet brush and container for pesticide | General | 55 | Expired |
| US5539225A | Accelerator-based methods and apparatus for measurement-while-drilling | Physics | 37 | Expired |
| US6648083B2 | Method and apparatus for measuring mud and formation properties downhole | Physics | 36 | Expired |
| US7073378B2 | Integrated logging tool for borehole | Physics | 31 | Expired |
| US6944548B2 | Formation evaluation through azimuthal measurements | Physics | 28 | Expired |
| US5767510A | Borehole invariant porosity measurement system | Physics | 26 | Expired |
| US8965703B2 | Applications based on fluid properties measured downhole | Fixed Constructions | 21 | Active |
| USRE36012E | Accelerator-based methods and apparatus for measurement-while-drilling | General | 19 | Expired |
| US6473899B1 | Field configurable embedded computer system | Physics | 16 | Expired |
| US6285026A | Borehole caliper derived from neutron porosity measurements | Fixed Constructions | 14 | Expired |
| USD336098S | Buoyant eyeglass holder | General | 13 | Expired |
| US7334465B2 | Integrated logging tool for borehole | Physics | 12 | Expired |
| US8664587B2 | Non-rotating logging-while-drilling neutron imaging tool | Physics | 10 | Active |
| US7361886B2 | Corrections of gamma-ray responses | Physics | 10 | Expired |
| US4201912A | Subthreshold neutron interrogator for detection of radioactive materials | Physics | 9 | Expired |
| US5086224A | Analysis of nuclear data for determining characteristics of earth formations traversed by a borehole | Physics | 9 | Expired |
| US8558165B2 | Nuclear tool | Physics | 8 | Active |
| US7642507B2 | Apparatus and methods for interlaced density and neutron measurements | Physics | 8 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.