Issued Patents 2002
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 6486316 | Process for making triazine UV absorbers using Lewis acids and reaction promoters | Ram B. Gupta, Sampath Venimadhavan, Russell C. Cappadona, Venkatrao K. Pai | 2002-11-26 |
| 6486317 | Process for making 2-hydroxy-4-alkoxyphenyl or 2,4-dihydroxyphenyl substituted 1,3,5-triazine UV absorbers | Ram B. Gupta, Sampath Venimadhavan, Russell C. Cappadona, Venkatrao K. Pai | 2002-11-26 |
| 6384113 | Benzocycle-substituted triazine and pyrimidine ultraviolet light absorbers | Ram B. Gupta, Robert G. Fischer | 2002-05-07 |
| 6365652 | Trisaryl-1,3,5-triazine ultraviolet light absorbers | Ram B. Gupta, Thomas P. Sassi, Gottfried Haacke | 2002-04-02 |
| 6355708 | Trisaryl-1,3,5-triazine ultraviolet light absorbers | Ram B. Gupta, Gottfried Haacke | 2002-03-12 |
| 6348591 | Red-shifted trisaryl-1,3,5-triazine ultraviolet light absorbers | Ram B. Gupta | 2002-02-19 |