Johnny W. Johnson
12Patents
9h-index
30Co-inventors
72Inventor score
Filing activity: Oct 18, 1985 → Feb 24, 2010
Most-cited inventions
| Patent | Title | Area | Cited by | Status |
|---|---|---|---|---|
| US6874353B2 | Yield point adaptation for rotating viscometers | Physics | 42 | Expired |
| US6782735B2 | Testing device and method for viscosified fluid containing particulate material | Physics | 38 | Expired |
| US6055874A | Apparatus and method for simulating well bore conditions | Physics | 28 | Expired |
| US6817376B2 | Gel hydration tank and method | Emerging Cross-Sectional Technologies | 27 | Expired |
| US4653313A | Positive stirring consistometer cup and method of using the same | Physics | 21 | Expired |
| US7392842B2 | Proppant suspension testing devices and methods of use | Physics | 21 | Expired |
| US7549320B2 | Measuring cement properties | Physics | 14 | Active |
| US7712526B2 | Proppant suspension testing devices and methods of use | Physics | 14 | Active |
| US7296927B2 | Laboratory apparatus and method for evaluating cement performance for a wellbore | Physics | 9 | Expired |
| US7499846B2 | Methods for using high-yielding non-Newtonian fluids for severe lost circulation prevention | Fixed Constructions | 3 | Active |
| US7325607B2 | Methods and systems for using high-yielding non-Newtonian fluids for severe lost circulation prevention | Fixed Constructions | 2 | Expired |
| US8447537B2 | Methods and apparatus for determining the permeability and diffusivity of a porous solid | Physics | 0 | Active |
Source: USPTO / EPO open patent data. Inventor disambiguation is heuristic; counts are objective bibliographic measures.