Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| RE34447 | Crystalline polyamide composition from dicarboxylic acid mixture and diamine | Wassily Poppe, Yu-Tsai Chen, Joel A. Richardson, David P. Sinclair | 1993-11-16 |
| 4827026 | Method for producing 5-t-butylisophthalic acid | Stephen P. Brugge, Jon J. Harper | 1989-05-02 |
| 4603166 | Crystalline polyamide composition from dicarboxylic acid mixture and diamine | Wassily Poppe, Yu-Tsai Chen, Joel A. Richardson, David P. Sinclair | 1986-07-29 |
| 4495328 | Crystalline copolyamides from terephthalic acid and hexamethylenediamine and trimethylhexamethylenediamine | Wassily Poppe, Yu-Tsai Chen | 1985-01-22 |