Issued Patents All Time
Showing 1–5 of 5 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5023267 | Microbiological control agent | Douglas D. Clarkson, Alan Marshall | 1991-06-11 |
| 4964952 | Method of controlling pitch using a cationically modified tannin | John J. Bennison | 1990-10-23 |
| 4863616 | Microbiological control process | Douglas D. Clarkson, Alan Marshall | 1989-09-05 |
| 4853411 | Biocide | Douglas D. Clarkson | 1989-08-01 |
| 4539071 | Biocide | Gerrard A. Birchall | 1985-09-03 |