Issued Patents All Time
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5149447 | Creosote filtration system with a shell and tube type filtration device | Mansour Mashayekhi, Joe E. Payne, C. Conrad Kempton | 1992-09-22 |
| 4603226 | Process for manufacturing creosote with non-settling out salts | George H. Collingwood, Gail L. Erickson, Howard L. Simon, Bill E. Sparling | 1986-07-29 |