Issued Patents All Time
Showing 1–8 of 8 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 10711175 | Compositions and methods for controlling paraffin and asphaltene problems in wells | Nelson Akaighe, Jorge Fernandez, Christian Jones | 2020-07-14 |
| 8257608 | Process and composition for froth flotation | Duane J. Lewis | 2012-09-04 |
| 8136669 | Process and composition for froth flotation | Duane J. Lewis | 2012-03-20 |
| 6268517 | Method for producing surfactant compositions | Elida G. Partain, Upali P. Weerasooriya | 2001-07-31 |
| 6147246 | Process for preparing alkoxylated dialkyl carbonate compounds | Upali P. Weerasooriya, K. Lee Matheson, Dewey L. Smith, Elida G. Partain, Kelly D. Knouse +1 more | 2000-11-14 |
| 6020509 | Method for producing surfactant compositions | Upali P. Weerasooriya, Janet L. Watson | 2000-02-01 |
| 5847210 | Process for producing surfactant composition | John Wei-Ping Lin, Upali P. Weerasooriya | 1998-12-08 |
| 5731461 | Surfactant composition and process for producing same | John Wei-Ping Lin, Upali P. Weerasooriya | 1998-03-24 |