Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6812195 | Concentrated detergent compositions with stable sudsing characteristics | Thomas James Wierenga | 2004-11-02 |
| 5919312 | Compositions and methods for removing oily or greasy soils | Thomas James Wierenga, David C. Underwood | 1999-07-06 |