Issued Patents All Time
Showing 1–6 of 6 patents
| Patent # | Title | Co-Inventors | Date |
|---|---|---|---|
| 4822420 | Sealing composition for soil barriers | Hansjurgen Hass, Reiner Hitze, Gunther Zoche | 1989-04-18 |
| 4759665 | Consolidating and/or sealing soils and composition therefor | Hansjurgen Hass | 1988-07-26 |
| 4645382 | Method for the isolation of pollutants in soil strata | Hansjurgen Hass | 1987-02-24 |
| 4609487 | Gel-forming mixture based on an alkali silicate and a trialkoxysilane | Hansjurgen Hass, Horst Hanisch, Gunter Vogel | 1986-09-02 |
| 4565577 | Pollutant-resistant sealing composition | Hansjurgen Hass | 1986-01-21 |
| 4289895 | Method for the preparation of oligomeric alkylene terephthalates | Gunther Meyer, Reinhard Schmidt, Klaus Thewalt | 1981-09-15 |