Issued Patents 1989
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4840667 | Metal-chelating diphenolamine oligomers for corrosion inhibition of metal substrates | Walter Siegl | 1989-06-20 |
| 4830680 | Corrosion inhibiting aqueous compositions comprising metal-chelating diphenolamine compounds | Walter Siegl | 1989-05-16 |
| 4808441 | Metal articles having corrosion-resistant epoxy coatings | Harendra S. Gandhi | 1989-02-28 |
| 4795505 | Corrosion inhibiting aqueous, acidic compositions comprising metal-chelating o-hydroxybenzylamine compound | Walter Siegl | 1989-01-03 |