Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4877453 | Process of pretreating a pozzolanic material for increasing the pozzolanic properties of said material | — | 1989-10-31 |
| 4780144 | Method for producing a building element from a fly ash comprising material and building element formed | — | 1988-10-25 |
| 4770709 | Process of pretreating a pozzolanic material for increasing the pozzolanic properties of said material | — | 1988-09-13 |
| 4490178 | Granulated material | Gijsbert Versteeg | 1984-12-25 |
| 4419312 | Method for making granular hydrothermally hardened material | Gijsbert Versteeg | 1983-12-06 |
| 4394176 | Method of producing silicate-containing granulates | — | 1983-07-19 |