Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5202161 | High sulfur level plastic container sulfonation process and article produced thereby | Robert D. Seizert, Mark Nulman | 1993-04-13 |
| 5156783 | Two stage process for sulfonating plastic containers | Robert D. Seizert, Mark Nulman, Donald L. Crites, William S. Aseltine | 1992-10-20 |