Issued Patents All Time
Showing 1–25 of 27 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9086349 | Sample digester with independently controllable sample temperature and ultraviolet irradiation | Graham Marshall, David J. Holdych | 2015-07-21 |
| 8365616 | Sampling probe for solutions containing soluble solids or high concentrations of dissolved solids | Graham Marshall | 2013-02-05 |
| 8029730 | Flow cell for chemiluminescence analysis | Don C. Olson, Graham Marshall | 2011-10-04 |
| 7767467 | Coaxial tubular sequestering device for micro spheres and cells | Graham Marshall | 2010-08-03 |
| 7625762 | Coaxial tubular sequestering device for micro spheres and cells | Graham Marshall | 2009-12-01 |
| 7416896 | Determination of plasma total and unbound bilirubin using zone fluidics | Charles E. Ahlfors, Graham Marshall | 2008-08-26 |
| 7188731 | Variable flexure-based fluid filter | Steve Brown, Billy Colston, Graham Marshall | 2007-03-13 |
| 6887429 | Apparatus and method for automated medical diagnostic tests | Graham Marshall, Daniel G. Ericson, Don C. Olson | 2005-05-03 |
| 6613579 | Sequential injection liquid-liquid extraction | — | 2003-09-02 |
| 6550348 | In-line filter probe for process analysis | — | 2003-04-22 |
| 6499362 | In-line filter probe for process analysis | — | 2002-12-31 |
| 6079313 | Pulseless, reversible precision piston-array pump | Graham Marshall | 2000-06-27 |
| 5988987 | Method for merging and/or ratio blending aliquant | Graham Marshall | 1999-11-23 |
| 5486330 | Process for producing plastic tubing of a selected length, wall thickness and inner diameter | Theodore N. Westlake, III | 1996-01-23 |
| 5469917 | Use of capillary-membrane sampling device to monitor oil-drilling muds | — | 1995-11-28 |
| 5442968 | Membrane-based fluid separations apparatus | Theodore N. Westlake, III, Gary D. DeLeo | 1995-08-22 |
| 5425869 | Polymeric film-based electrochemical sensor apparatus | Stephen A. Noding, Charles Benjamin Miller, Carolyn W. Ribes, Sten A. Wallin, Beatriz Cisneros | 1995-06-20 |
| 5416576 | Serpentine coil spectrophotometer cell | Theodore N. Westlake, III | 1995-05-16 |
| 5398559 | Sample probe with temperature monitoring and/or control | Theodore N. Westlake, III | 1995-03-21 |
| 5346605 | Apparatus for quantitative determination of chemical oxidizing or reducing agents in a fluid environment | Stephen A. Noding | 1994-09-13 |
| 5317932 | Sample probe | Theodore N. Westlake, III | 1994-06-07 |
| 4999305 | Apparatus for titration flow injection analysis | Ernest D. Graves, Jr., David G. Hunt | 1991-03-12 |
| 4981567 | Lithium-salt reference half-cell for potentiometric determinations | — | 1991-01-01 |
| 4798803 | Method for titration flow injection analysis | Ernest D. Graves, Jr., David G. Hunt | 1989-01-17 |
| 4724050 | Pretreatment of ion exchange membrane | Sheryl M. Bergeron | 1988-02-09 |