Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 8778859 | Lubricant useful for improving the oil separation performance of a vapor compression system | Kenneth C. Lilje, John Carl Tolfa | 2014-07-15 |
| 6983614 | Heat transfer fluid for secondary refrigeration systems comprising a formate salt and sulfamic acid | Diane L. Dick, Gilbert R. Malone | 2006-01-10 |
| 6677284 | Lubricant composition for ammonia based refrigerants with good seal performance | John Carl Tolfa, Hsinheng Li | 2004-01-13 |
| 6374629 | Lubricant refrigerant composition for hydrofluorocarbon (HFC) refrigerants | Jill Ellen Oberle | 2002-04-23 |
| 6267907 | Lubricant composition comprising an aliphatic substituted naphthalene alone or in combination refrigeration systems | John Carl Tolfa | 2001-07-31 |
| 5595678 | Lubricant composition for ammonia refrigerants used in compression refrigeration systems | Glenn D. Short, Lars I. Sj oholm | 1997-01-21 |