Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5188773 | Tower packing with small and large louvers and mixing method | Gilbert K. Chen, Robert McKelvy, Don Glaspie, George De Bruyn | 1993-02-23 |
| 5185106 | Tower packing with small louvers and mixing method | Gilbert K. Chen, Robert McKelvy, Don Glaspie, George De Bruyn | 1993-02-09 |
| 5106556 | Method of downcoer-tray vapor venting | Michael J. Binkley, John T. Thorngren, Gary W. Gage, Daniel H. Beckman | 1992-04-21 |
| 5080836 | Tower packing with small and large louvers | Gilbert K. Chen, Robert McKelvy, Don Glaspie | 1992-01-14 |
| 5057250 | Tower packing with small louvers | Gilbert K. Chen, Robert McKelvy, Don Glaspie | 1991-10-15 |
| 4956127 | Downcomer-tray assembly and method | Michael J. Binkley, John T. Thorngren, Gary W. Gage | 1990-09-11 |
| 4686027 | Asphalt coking method | John Daniel Elliott | 1987-08-11 |