Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5681433 | Membrane dehydration of vaporous feeds by countercurrent condensable sweep | Dwayne T. Friesen, Scott B. McCray, Roderick J. Ray | 1997-10-28 |
| 5645626 | Composite hydrogen separation element and module | David J. Edlund, Chester B. Frost | 1997-07-08 |
| 5611842 | Organic and inorganic vapor permeation by countercurrent condensable sweep | Dwayne T. Friesen, Scott B. McCray, Roderick J. Ray | 1997-03-18 |