Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4826423 | Construction of thermoplastic tubes with tubular ribs by helical winding upon a mandrel | Eric E. Kemp, Leonard F. Sansone | 1989-05-02 |
| 4820849 | Process for reducing corrosive impurities in sulfolane used for extracting aromatic hydrocarbons | Zaida Diaz | 1989-04-11 |