Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5644932 | Use of structured packing in a multi-sectioned air seperation unit | Brian R. Dunbobbin, Mark Robert Pillarella | 1997-07-08 |
| 5305610 | Process and apparatus for producing nitrogen and oxygen | Keith A. Ludwig, Robert F. Weimer | 1994-04-26 |
| RE34038 | Separating argon/oxygen mixtures using a structured packing | Keith A. Ludwig, George S. Witmer, Charles M. Woods | 1992-08-25 |
| 5122174 | Boiling process and a heat exchanger for use in the process | Swaminathan Sunder, Donn Michael Herron, Keith A. Ludwig, Edwin C. Rogusky | 1992-06-16 |
| D322353 | Toe protector insert | — | 1991-12-17 |
| 4981111 | Circulating fluidized bed combustion reactor with fly ash recycle | David Studer | 1991-01-01 |
| 4871382 | Air separation process using packed columns for oxygen and argon recovery | Robert M. Thorogood, Rodney John Allam, Alan L. Prentice, Bruce K. Dawson | 1989-10-03 |
| 4836836 | Separating argon/oxygen mixtures using a structured packing | Keith A. Ludwig, George S. Witmer, Charles M. Woods | 1989-06-06 |
| 4813988 | Suitable distillation column packing for the cryogenic separation of air | Keith A. Ludwig, Andrew J. Patrylak, John S. Zabrenski | 1989-03-21 |
| 4700771 | Multi-zone boiling process and apparatus | Keith A. Ludwig, Alexander Schwarz | 1987-10-20 |
| 4653572 | Dual-zone boiling process | Alexander Schwarz, Robert M. Thorogood | 1987-03-31 |
| 4510023 | Perforated bubble caps for enhanced vapor/liquid contact on a distillation tray | Thomas J. Edwards, Howard C. Rowles | 1985-04-09 |
| 4411756 | Boiling coolant ozone generator | Donald C. Amoss | 1983-10-25 |