Issued Patents 1997
Showing 1–3 of 3 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5656586 | Amphoteric surfactants having multiple hydrophobic and hydrophilic groups | Ji Li, Manilal S. Dahanayake, David J. Tracy | 1997-08-12 |
| 5643498 | Quaternary cationic surfactants having multiple hydrophobic and hydrophilic groups | Ji Li, Manilal S. Dahanayake, David J. Tracy | 1997-07-01 |
| 5643864 | Anionic surfactants having multiple hydrophobic and hydrophilic groups | Ji Li, Manilal S. Dahanayake, David J. Tracy | 1997-07-01 |