Issued Patents All Time
Showing 1–18 of 18 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7018558 | Method of improving performance of refrigerant systems | Bruce J. Beimesch | 2006-03-28 |
| 6666985 | Polyol ester lubricants for hermetically sealed refrigerating compressors | Eugene R. Zehler | 2003-12-23 |
| 6551523 | Blended polyol ester lubricants for refrigerant heat transfer fluids | — | 2003-04-22 |
| 6551524 | Polyol ester lubricants, especially those compatible with mineral oils, for refrigerating compressors operating at high temperatures | — | 2003-04-22 |
| 6350392 | Blended polyol ester lubricants for refrigerant heat transfer fluids | — | 2002-02-26 |
| 6296782 | Polyol ester lubricants for refrigerator compressors operating at high temperatures | Eugene R. Zehler | 2001-10-02 |
| 6267906 | Polyol ester lubricants for refrigerating compressors operating at high temperature | Eugene R. Zehler | 2001-07-31 |
| 6221272 | Polyol ester lubricants for hermetically sealed refrigerating compressors | Eugene R. Zehler | 2001-04-24 |
| 6183662 | Polyol ester lubricants, especially those compatible with mineral oils, for refrigerating compressors operating at high temperatures | — | 2001-02-06 |
| 5976399 | Blended polyol ester lubricants for refrigerant heat transfer fluids | — | 1999-11-02 |
| 5906769 | Polyol ester lubricants for refrigerating compressors operating at high temperatures | Eugene R. Zehler | 1999-05-25 |
| 5853609 | Polyol ester lubricants for hermetically sealed refrigerating compressors | Eugene R. Zehler | 1998-12-29 |
| 5851968 | Increasing the electrical resistivity of ester lubricants, especially for use with hydrofluorocarbon refrigerants | — | 1998-12-22 |
| 5833876 | Polyol ester lubricants for refrigerating compressors operating at high temperatures | Eugene R. Zehler | 1998-11-10 |
| 5820777 | Blended polyol ester lubricants for refrigerant heat transfer fluids | Eugene R. Zehler | 1998-10-13 |
| 5021179 | Lubrication for refrigerant heat transfer fluids | Eugene R. Zehler | 1991-06-04 |
| 4519932 | Low temperature hydraulic fluids based on two centistoke synthetic hydrocarbons | Bruce J. Beimesch | 1985-05-28 |
| 4477383 | Di- and tripentaerythritol esters of isostearic acid | Bruce J. Beimesch, Clarence J. Hughes, Jr. | 1984-10-16 |