Issued Patents All Time
Showing 1–4 of 4 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4466834 | Corrosion inhibiting additive for cement compositions | Thomas HAYDEN | 1984-08-21 |
| 4336069 | High strength aggregate for concrete | Lawrence R. Roberts | 1982-06-22 |
| 4318744 | Strength enhancing admixture for concrete compositions | — | 1982-03-09 |
| 4210457 | Portland cement-fly ash-aggregate concretes | Lawrence R. Roberts | 1980-07-01 |