Issued Patents All Time
Showing 26–29 of 29 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7626065 | Process for producing para-xylene | John Di-Yi Ou, Harold W. Helmke | 2009-12-01 |
| 7439412 | Process for producing para-xylene | John Di-Yi Ou, Harold W. Helmke | 2008-10-21 |
| 7249469 | Method for separating a multicomponent stream | — | 2007-07-31 |
| 4791791 | Cryosorption surface for a cryopump | Christopher Flegal, deceased | 1988-12-20 |