Issued Patents All Time
Showing 26–42 of 42 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6261455 | Centrifuge cartridge for removing soot from oil in vehicle engine applications | Steven J. Merritt, Farrell F. Calcaterra | 2001-07-17 |
| 6023834 | Method for assembling an improved bead-lock high-pressure filter utilizing a stamped metal cover | Steven C. Julson | 2000-02-15 |
| 5988399 | Spin-on filter | David A. Biere | 1999-11-23 |
| 5948248 | Coolant filter having a delayed release supplemental coolant additive cartridge | — | 1999-09-07 |
| 5906740 | Spin-on filter with improved retaining groove | David A. Biere | 1999-05-25 |
| 5803024 | Coolant filter having a delayed release supplemental coolant additive cartridge | — | 1998-09-08 |
| 5766468 | Dual media primary/secondary fuel filter | Steven J. Merritt, David A. Biere | 1998-06-16 |
| 5738785 | Oil filter housing | Jeffrey E.D. Rogers | 1998-04-14 |
| 5702602 | Filter system with environmentally friendly filter cartridge | Jeffrey E.D. Rogers | 1997-12-30 |
| 5685985 | Environmentally friendly filter cartridge | Jeffrey E.D. Rogers | 1997-11-11 |
| 5547565 | Fuel/water separator with adaptor plate for drain valve and water detector | David A. Biere, O. Troy McConaughey | 1996-08-20 |
| 5525226 | Preformed gasket with retaining tabs | Kenton L. Jorgenson | 1996-06-11 |
| 5484466 | Air filter element with radial seal sealing gasket | Farrell F. Calcaterra, Daniel Sleicher | 1996-01-16 |
| 5342511 | Oil filter with inner and outer coaxial filter elements | Troy McConaughey | 1994-08-30 |
| 5144978 | Self-venting drain valve | David A. Biere | 1992-09-08 |
| 5080787 | High-pressure filter assembly, method and apparatus for forming high-pressure filters | William R. Knox | 1992-01-14 |
| 4738776 | Lubricant filter assembly | — | 1988-04-19 |