Issued Patents All Time
Showing 1–11 of 11 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6284723 | Antimicrobial hard surface cleaner | Boli Zhou, Wayne B. Scott | 2001-09-04 |
| 6013615 | Antimicrobial hard surface cleaner | Boli Zhou | 2000-01-11 |
| 5364554 | Proteolytic perhydrolysis system and method of use for bleaching | Fred A. Heitfeld, Richard J. Wiersema, Ayyookaran J. Poulose | 1994-11-15 |
| 5296161 | Enzymatic perhydrolysis system and method of use for bleaching | Richard J. Wiersema | 1994-03-22 |
| 5189987 | Odor controlling animal litter with pine oil | J. Bruce England | 1993-03-02 |
| 5183655 | Combined odor controlling animal litter | J. Bruce England, Steven D. Ratcliff | 1993-02-02 |
| 5135743 | Combined odor controlling animal litter | J. Bruce England, Steven D. Ratcliff | 1992-08-04 |
| 5030240 | Enzymatic peracid bleaching system | Richard J. Wiersema, Gregory L. Gray, Ayrookaram J. Poulose, Scott D. Power | 1991-07-09 |
| 5018482 | Combined odor controlling animal litter | J. Bruce England, Steven D. Ratcliff | 1991-05-28 |
| 5016568 | Odor controlling animal litter with pine oil | J. Bruce England | 1991-05-21 |
| 4511490 | Cooperative enzymes comprising alkaline or mixtures of alkaline and neutral proteases without stabilizers | Richard J. Wiersema | 1985-04-16 |