Issued Patents All Time
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5525195 | Process for high consistency delignification using a low consistency alkali pretreatment | William H. Friend, Spencer W. Eachus, Bruce F. Griggs | 1996-06-11 |
| 5409570 | Process for ozone bleaching of oxygen delignified pulp while conveying the pulp through a reaction zone | Bruce F. Griggs, Thomas P. Gandek, Michael A. Pikulin, Allen Rosen, Spencer W. Eachus +3 more | 1995-04-25 |
| 5173153 | Process for enhanced oxygen delignification using high consistency and a split alkali addition | Spencer W. Eachus, Bruce F. Griggs | 1992-12-22 |