Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 5421209 | Measurement of steam quality and mass flow rate | James W. Scott, Sze-Foo Chien, Peter L. Sigwardt | 1995-06-06 |
| 5199496 | Subsea pumping device incorporating a wellhead aspirator | Peter L. Sigwardt | 1993-04-06 |
| 5195380 | Petroleum stream analyzing means and method | Gregory J. Hatton, Michael G. Durrett, Earl L. Dowty, Gary E. Collier, Steven Miles Stockman | 1993-03-23 |
| 5141055 | Method and apparatus for controlling the mass flow rate of steam in steam distribution systems | Sze-Foo Chien, Joseph A. Anderson, James W. Scott, Peter L. Sigwardt | 1992-08-25 |
| 5031465 | Steam quality and mass flow rate measurement using critical flow choke upstream of an orifice plate | — | 1991-07-16 |
| 5031466 | Method and apparatus for determining steam quality and mass flow rate | — | 1991-07-16 |
| 4836032 | Method of determining the quality of steam for stimulating hydrocarbon production | Sze-Foo Chien, Peter L. Sigwardt | 1989-06-06 |
| 4681466 | Method for determining quality of reduced quality steam | Sze-Foo Chien, Peter L. Sigwardt | 1987-07-21 |