Issued Patents 1989
Showing 1–2 of 2 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4879410 | Preparation of primary aralkyl urethanes and ureas and isocyanates derived therefrom | Laurence W. Chang, William A. Henderson | 1989-11-07 |
| 4810296 | Hydroxamated polymers as additives for retarding the rate of set of hydraulic cement compositions | Gerald J. Guerro, William A. Henderson | 1989-03-07 |