Issued Patents All Time
Showing 1–25 of 25 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7114844 | Aeration apparatus and method | — | 2006-10-03 |
| 6997444 | Radial disc impeller apparatus and method | Gary Hodenius, Richard Howk | 2006-02-14 |
| 6986507 | Mass transfer method | — | 2006-01-17 |
| 6896246 | Aeration apparatus and method | Gary Hodenius, Richard Howk | 2005-05-24 |
| 6811296 | Aeration apparatus and method | — | 2004-11-02 |
| 6808306 | Mixing vessel apparatus and method | — | 2004-10-26 |
| 6334705 | Fluid mixing impellers with shear generating venturi | — | 2002-01-01 |
| 6250797 | Mixing impeller system having blades with slots extending essentially all the way between tip and hub ends thereof which facilitate mass transfer | — | 2001-06-26 |
| 6089748 | Apparatus for stabilizing a mixer which circulates liquid against excessive oscillation | Keith T. McDermott | 2000-07-18 |
| 5951162 | Mixing impellers and impeller systems for mixing and blending liquids and liquid suspensions having efficient power consumption characteristics | Keith T. McDermott | 1999-09-14 |
| 5501523 | Impeller system for mixing and enhanced-flow pumping of liquids | Richard Howk, Thomas A. Post | 1996-03-26 |
| 5344235 | Erosion resistant mixing impeller | Frederick W. Kehr, III, Thomas Alan Taylor, Jonathan C. Everdyke | 1994-09-06 |
| 5158434 | Mixing impellers and impeller systems for mixing and blending liquids and liquid suspensions having a wide range of viscosities | — | 1992-10-27 |
| 5112192 | Mixing impellers and impeller systems for mixing and blending liquids and liquid suspensions having a wide range of viscosities | — | 1992-05-12 |
| 5076760 | Injection molded, high strength impeller | Walter C. Webster | 1991-12-31 |
| 5046245 | Methods of fabricating impeller blades for mixing apparatus | Richard Howk | 1991-09-10 |
| 5006283 | Mixing system for dispersing a compressible fluid such as gas into liquid in a vessel | Marlin D. Schutte, Craig B. Bahr, Richard Howk | 1991-04-09 |
| 4896971 | Mixing apparatus | Richard Howk | 1990-01-30 |
| 4882098 | Mass transfer mixing system especially for gas dispersion in liquids or liquid suspensions | — | 1989-11-21 |
| 4802771 | Mixing apparatus | — | 1989-02-07 |
| 4571090 | Mixing systems | Jerry A. Carpenter, Chandler K. Coyle, Keith T. McDermott, Roger N. Voss | 1986-02-18 |
| 4527904 | Measurement of fluid forces in mixing apparatus and the control of mixing apparatus in response to fluid forces | — | 1985-07-09 |
| 4468130 | Mixing apparatus | — | 1984-08-28 |
| 4459030 | Draft tube apparatus | — | 1984-07-10 |
| 4454078 | Mixing systems having agitators for mixing gas with liquid | Horst P. Engelbrecht | 1984-06-12 |