Charles Flaum
26Patents
15h-index
33Co-inventors
81Inventor score
Filing activity: Nov 5, 1980 → Jan 28, 2008
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6088656A | Method for interpreting carbonate reservoirs | Physics | 62 | Expired |
| US4423323A | Neutron logging method and apparatus for determining a formation characteristic free of environmental effects | Physics | 52 | Expired |
| US6140817A | Magnetic resonance well logging method and apparatus | Emerging Cross-Sectional Technologies | 47 | Expired |
| US4464569A | Method and apparatus for spectroscopic analysis of a geological formation | Physics | 42 | Expired |
| US5789669A | Method and apparatus for determining formation pressure | Fixed Constructions | 41 | Expired |
| US6891369B2 | Nuclear magnetic resonance method and logging apparatus for fluid analysis | Physics | 41 | Expired |
| US6570382B1 | Nuclear magnetic resonance method and logging apparatus | Physics | 39 | Expired |
| US6232778A | Method for obtaining NMR bound fluid volume using partial polarization | Physics | 33 | Expired |
| US6023163A | Well logging method and apparatus for determining gas and diffusion coefficient using NMR | Physics | 30 | Expired |
| US4794792A | Method for determining formation characteristics with enhanced vertical resolution | Physics | 28 | Expired |
| US7511487B2 | Logging method for determining characteristic of fluid in a downhole measurement region | Physics | 20 | Active |
| US7408150B1 | Well logging method for determining formation characteristics using pulsed neutron capture measurements | Physics | 17 | Active |
| US4909075A | Method for determining formation characteristics with enhanced statistical precision without degrading the vertical resolution or with enhanced vertical resolution | Physics | 17 | Expired |
| US7804296B2 | Methods and apparatus for monitoring a property of a formation fluid | Physics | 15 | Active |
| US6147489A | Method and apparatus for measuring total nuclear magnetic resonance porosity | Emerging Cross-Sectional Technologies | 15 | Expired |
| US6097184A | Nuclear magnetic resonance well logging to determine gas-filled porosity and oil-filled porosity of earth formations without a constant static magnetic field gradient | Physics | 12 | Expired |
| US6600315B1 | Method for improving resolution of nuclear magnetic resonance measurements by combining low resolution high accuracy measurements with high resolution low accuracy measurements | Physics | 12 | Expired |
| US6268603A | Method and apparatus for interpreting fluorescence logging data | Fixed Constructions | 11 | Expired |
| US4384205A | Neutron method and apparatus for determining total cross-section | Physics | 10 | Expired |
| US5019708A | Method for eliminating the effect of rugosity from compensated formation logs by geometrical response matching | Physics | 10 | Expired |
| US7361886B2 | Corrections of gamma-ray responses | Physics | 10 | Expired |
| US4786796A | Method for determining formation characteristics with enhanced vertical resolution | Physics | 9 | Expired |
| US4816674A | Determining a formation porosity from neutron logging information | Physics | 9 | Expired |
| US7642507B2 | Apparatus and methods for interlaced density and neutron measurements | Physics | 8 | Active |
| US6850060B2 | Method and apparatus for rapid characterization of diffusion | Physics | 6 | Expired |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.