Issued Patents All Time
Showing 1–19 of 19 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 7485723 | Process for making trisaryl triazine UV absorbers using Lewis acids and reaction promoters | Ram B. Gupta, Sampath Venimadhavan, Russell C. Cappadona, Venkatrao K. Pai | 2009-02-03 |
| 6900314 | Process for making triazine UV absorbers using lewis acids and reaction promoters | Ram B. Gupta, Sampath Venimadhavan, Russell C. Cappadona, Venkatrao K. Pai | 2005-05-31 |
| 6730785 | Process for making triazine UV absorbers using lewis acids and reaction promoters | Ram B. Gupta, Sampath Venimadhavan, Russell C. Cappadona, Venkatrao K. Pai | 2004-05-04 |
| 6710177 | Process for making triazine UV absorbers using Lewis acids and reaction promoters | Ram B. Gupta, Sampath Venimadhavan, Russell C. Cappadona, Venkatrao K. Pai | 2004-03-23 |
| 6509399 | Non-yellowing part-tertiary-alkyl phenyl substituted triazine and pyrimidine ultraviolet light absorbers | Ram B. Gupta | 2003-01-21 |
| 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 |
| 6306939 | Poly-trisaryl-1,3,5-Triazine carbamate ultraviolet light absorbers | Ram B. Gupta | 2001-10-23 |
| 6297377 | Benzocycle-substituted triazine and pyrimidine ultraviolet light absorbers | Ram B. Gupta, Robert G. Fischer | 2001-10-02 |
| 6297378 | Process for making 2-(2-hydroxy-4-alkoxyphenyl)-4,6-bisaryl-1,3,5-triazines | Ram B. Gupta, Sampath Venimadhavan, Russell C. Cappadona, Venkatrao K. Pai | 2001-10-02 |
| 6265576 | Trisaryl-1,3,5-triazine ultraviolet light absorbers | Ram B. Gupta, Thomas P. Sassi, Gottfried Haacke | 2001-07-24 |
| 6242597 | Trisaryl-1,3,5-triazine ultraviolet light absorbers | Ram B. Gupta, Gottfried Haacke | 2001-06-05 |
| 6239275 | Trisaryl-1,3,5-triazine ultraviolet light absorbers containing hindered phenols | Ram B. Gupta | 2001-05-29 |
| 6239276 | Non-yellowing para-tertiary-alkyl phenyl substituted triazine and pyrimidine ultraviolet light absorbers | Ram B. Gupta | 2001-05-29 |
| 6225468 | Process for making 2-(2,4,-dihydroxyphenyl) or 2-(2,4-dialkoxyphenyl)-4,6-bisaryl-1,3,5-triazines | Ram B. Gupta, Sampath Venimadhavan, Russell C. Cappadona, Venkatrao K. Pai | 2001-05-01 |