Issued Patents All Time
Showing 51–69 of 69 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4285401 | Electric and hydraulic powered thermal stimulation and recovery system and method for subterranean wells | — | 1981-08-25 |
| 4283005 | Pump and centrifugal separator apparatus | — | 1981-08-11 |
| 4281962 | High pressure centrifugal pump | — | 1981-08-04 |
| 4280662 | Erosion resistant jet pump and method of making same | Harold L. Petrie | 1981-07-28 |
| 4279571 | Pitot pump with fluid lubricated bearings | — | 1981-07-21 |
| 4278399 | Pumping stage for multi-stage centrifugal pump | — | 1981-07-14 |
| 4273509 | Self-powered cleaning unit for a fluid pump | F. Barton Brown, Thomas A. White | 1981-06-16 |
| 4269872 | Method of producing an erosion resistant surface | — | 1981-05-26 |
| 4268281 | Method of removing particulate contaminants from a gas stream | — | 1981-05-19 |
| 4264285 | Downhole cleaner assembly for cleansing lubricant of downhole turbo-machines within wells | Harold L. Petrie | 1981-04-28 |
| 4264269 | Centrifugal pitot pump with improved pitot | Carter P. Williams, Vitolis Budrys | 1981-04-28 |
| 4262226 | Insulating fluid system for protecting submersible electric motors from surrounding fluids | — | 1981-04-14 |
| 4260658 | Erosion resistant surface | — | 1981-04-07 |
| 4253524 | High flow check valve apparatus | — | 1981-03-03 |
| 4252499 | Centrifugal pump | — | 1981-02-24 |
| 4249860 | Pumping apparatus for fluids containing abrasive particulates | — | 1981-02-10 |
| 4227865 | Constant fluid film thickness hydrostatic thrust bearing | John M. Kelleher | 1980-10-14 |
| 4198218 | Gas separation apparatus | — | 1980-04-15 |
| 4183713 | Pitot pump with jet pump operated thrust balance | Francis B. Brown | 1980-01-15 |