Issued Patents All Time
Showing 1–12 of 12 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 11162879 | Particle detection system and method | Derek Oberreit, Patricia B. Keady, Siqin He | 2021-11-02 |
| 10697879 | Colloid size distribution measurement technology | Derek Oberreit, Donald C. Grant, Gary Van Schooneveld, Mark R. Litchy | 2020-06-30 |
| 9958371 | Colloid size distribution measurement technology | Derek Oberreit, Donald C. Grant, Gary Van Schooneveld, Mark R. Litchy | 2018-05-01 |
| 9086350 | Particle concentration measurement technology | Donald C. Grant, Mark R. Litchy, Derek Oberreit | 2015-07-21 |
| 8552719 | Method and apparatus for the purification and analytical evaluation of highly purified liquids | Arthur John Ackermann, Glen Walter Wildermuth | 2013-10-08 |
| 8272253 | Particle concentration measurement technology | Donald C. Grant, Mark R. Litchy | 2012-09-25 |
| 7852465 | System for measuring liquid flow rates | Frederick R. Quant, Derek Oberreit | 2010-12-14 |
| 7777868 | System for measuring non-volatile residue in ultra pure water | Frederick R. Quant, Derek Oberreit | 2010-08-17 |
| 5374396 | Syringe injection system for measuring non-volatile residue in solvents | Thomas A. Kerrick, David S. Ensor, Elizabeth A. Hill | 1994-12-20 |
| 5351523 | Apparatus and process for determining filter efficiency in removing colloidal suspensions | Thomas A. Kerrick, Georg Schurmann, Kevin T. Pate | 1994-10-04 |
| 5121988 | Single particle detector method and apparatus utilizing light extinction within a sheet of light | James L. Blesener, Stanley L. Kaufman, Frank D. Dorman, Peter P. Hairston | 1992-06-16 |
| 5098657 | Apparatus for measuring impurity concentrations in a liquid | Frederic R. Quant, Thomas A. Kerrick, Gilmore J. Sem, Darrell D. Havir | 1992-03-24 |