Issued Patents All Time
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7975658 | Air port and smelt spout cleaner and drop jaw tip | Michael deSousa | 2011-07-12 |
| 7947216 | Smelt spout opening cleaner, cleaning head and apparatus | — | 2011-05-24 |
| 7625518 | Smelt spout opening cleaner, cleaning head and apparatus | — | 2009-12-01 |
| 6055943 | Air port casting | Steven M. Cochrane | 2000-05-02 |
| 5414887 | Apparatus for cleaning air ports of a chemical recovery furnace | Clayton J. Abel, Daniel R. Higgins | 1995-05-16 |
| 5351631 | Removable damper for chemical recovery furnace | Robert B. Hill, Daniel R. Higgins | 1994-10-04 |
| 5307745 | Removable damper for chemical recovery furnace | Daniel R. Higgins, Robert B. Hill | 1994-05-03 |
| 5167192 | Damper controller for a chemical recovery furnace | Daniel R. Higgins | 1992-12-01 |