Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10975524 | Process for making paper with improved filler retention and opacity while maintaining wet tensile strength | Ashley Hawkins Lewis | 2021-04-13 |
| 9719212 | Process to improve performance of wet-strength resins through base activation | Michael A. Evans, Ashley Hawkins Lewis, Jeffrey H. Peltier, Bryan K. Spraul, Richard J. Riehle | 2017-08-01 |
| 7175740 | Reduced by product polyamine-epihalohydrin resins | Richard J. Riehle, Anthony J. Allen, Michaela Hofbauer, Alfred Haandrikman, Ronald Busink +5 more | 2007-02-13 |
| 6554961 | Reduced byproduct polyamine-epihalohydrin resins | Richard J. Riehle, Anthony J. Allen, Michaela Hofbauer, Alfred Haandrikman, Ronald Busink +5 more | 2003-04-29 |
| 6197919 | Resins of amphoteric aldehyde polymers and use of said resins as temporary wet-strength or dry-strength resins for paper | Richard J. Riehle | 2001-03-06 |