Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5624488 | Ultrahigh brightness calcined clay pigment, manufacture & use thereof | Paul R. Suitch, Thomas K. Dombrowski | 1997-04-29 |
| 5391526 | Situ method for producing hydrosulfite bleach and use thereof | Mitchell J. Willis, Raymond H. Young, Larry W. Donaldson | 1995-02-21 |
| 5342443 | Method for bleaching kaolin clay | George E. Gantt, Mitchell J. Willis, Raymond H. Young | 1994-08-30 |
| 5145814 | In situ method for producing hydrosulfite beach and use thereof | Mitchell J. Willis, Raymond H. Young, Larry W. Donaldson | 1992-09-08 |
| 4510254 | Method of treating zeolite ores to remove discoloring impurities and improve its brightness and resulting finely ground zeolite | Horton H. Morris, John R. Whyte, Jr., Catherine M. Dentan, David Robert Collins | 1985-04-09 |