Issued Patents All Time
Showing 1–13 of 13 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 9255650 | Movable valve apparatus having conditioned lubricating surfaces | Mark J. Linser | 2016-02-09 |
| 9182053 | Methods and apparatus to load a valve packing | Randall Scott Collison, Loren L. Bovee, David Charles Stanze | 2015-11-10 |
| 8857792 | Seal ring assemblies for use with rotary valves | Timothy Randall Parrie, Steven Douglas Cherry | 2014-10-14 |
| 8632053 | Movable valve apparatus having conditioned lubricating surfaces | Mark J. Linser | 2014-01-21 |
| 8613423 | Methods and apparatus to load a valve packing | Randall Scott Collison, Loren L. Bovee, David Charles Stanze | 2013-12-24 |
| 7416164 | Elliptical sealing surface for butterfly valve | Philip W. Eggleston, James Leroy Lounsberry | 2008-08-26 |
| 7296585 | Elliptical sealing surface for butterfly valve | Philip W. Eggleston, James Leroy Lounsberry | 2007-11-20 |
| 7080820 | Elliptical sealing surface for butterfly valve | Philip W. Eggleston, James Leroy Lounsberry | 2006-07-25 |
| 5542681 | Graphite packing | Virgil W. Pepper, Frank E. Jensen | 1996-08-06 |
| 5535986 | Torsionallly loaded fluid seals for rotary valves | Timothy A. McMahon, Brian Nolan, Steven M. Kirk, Paul R. Hunsberger, Jr. | 1996-07-16 |
| 5299812 | Graphite packing | Ronald R. Brestel, Ronnald J. Funk, William C. Scheffert, Virgil W. Pepper, Frank E. Jensen | 1994-04-05 |
| 5131666 | Zero clearance anti-extrusion rings for containment of PTFE packing | — | 1992-07-21 |
| 4846213 | Drain through ball valve | Robert F. Berry, Jr., Kurt J. Leger | 1989-07-11 |